Simple electromagnetic crane project grade 7 - Grade 7 technology project electromagnetic crane answers; Get good pdf here - Wakulimaforum (2023)

Simple electromagnetic crane project grade 7 – Grade 7 technology project electromagnetic crane answers

Meaning of crane with an electromagnet?

Magnet Crane
Simple electromagnetic crane project grade 7 – Grade 7 technology project electromagnetic crane answers; Also referred to as electromagnetic cranes, these cranes are used to handle and move metals like steel and iron. Magnet cranes can be found mostly in recycling plants and scrap yards. They operate using a magnetic field that is formed by an electric current passing through windings around the magnet.

An electromagnet is a kind of magnet where the magnetic field is created by an electric current. The uses of electromagnets are given here to help learners understand the topic more effectively. Electromagnets can be considered as a temporary magnet that functions with the help of an electric current. The magnetic strength of an electromagnet can be easily altered by varying the amount ofelectric currentand its polarity can be changed by varying the direction of the electric current.

Electromagnets are used for various purposes on a day-to-day basis. For example, electromagnets are used in the large cranes which are used in waste yards. Electromagnets are also widely used in numerous electromechanical and electronic devices. Some common uses are given below.

10 Uses of Electromagnets

  1. Generators, motors, and transformers
  2. Electric buzzers and bells
  3. Headphones and loudspeakers
  4. Relays and valves
  5. Data storage devices like VCRs, tape recorders, hard discs, etc.
  6. Induction cooker
  7. Magnetic locks
  8. MRI machines
  9. Particle accelerators
  10. Mass spectrometers

Uses in Home Appliances

Most of the electric appliances used in the home use electromagnetism as the basic working principle. Some electromagnet uses in the home include an electric fan, electric doorbell, induction cooker, magnetic locks, etc. In an electric fan, the electromagnetic induction keeps the motor rotating on and on making the blade of the fan to rotate. Also in an electric doorbell when the button is pressed, due to the electromagnetic forces the coil gets energized and the bell sounds.

Uses in Medical Field

The uses of electromagnets are also seen in the medical field. MRI scan which is short for Magnetic Resonance Imaging is a device that uses electromagnets. The device can scan all the tiny details in the human body with the help of electromagnetism.

Uses in Memory Storage Devices and Computer Hardware

The data in ebook gadgets and phones are stored in the electromagnetic format in the form of bytes and bits. The computer hardware is also having a magnetic tape which works on theprinciple of electromagnetism. Even in the olden days’ electromagnets had a huge role in the data storage of VCP and VCR.

Uses in Communication Devices and Power Circuits

Without electromagnets, the mobiles and the telephones we used to make phone calls over a long distance could not have taken shape. The electromagnetic pulses and the interaction of the signals make mobiles and telephones very handy.

These were some application uses of electromagnets. Stay tuned with BYJU’S to learn more interesting Physics concepts with the help of interactive video lessons.

How do you make an electromagnet project?

Simple electromagnetic crane project grade 7 - Grade 7 technology project electromagnetic crane answers; Get good pdf here - Wakulimaforum (1)

Later to wind the coil. Pull the wire taut with your fingers. And rotate the bolt slowly to preventMore

How do you make a homemade electromagnet?

Electromagnets can be created bywrapping a wire around an iron nail and running current through the wire. The electric field in the wire coil creates a magnetic field around the nail. In some cases, the nail will remain magnetised even when removed from within the wire coil.1

Experiment Design:

Design an experiment to test eachhypothesis.Make a step-by-step list of what you will do to answer each question. This list is called an experimental procedure. For an experiment to give answers you can trust, it must have a “control.” A control is an additional experimental trial or run. It is a separate experiment, done exactly like the others. The only difference is that no experimental variables are changed. A control is a neutral “reference point” for comparison that allows you to see what changing a variable does by comparing it to not changing anything. Dependable controls are sometimes very hard to develop. They can be the hardest part of a project. Without a control you cannot be sure that changing the variable causes your observations. A series of experiments that includes a control is called a “controlled experiment.”

Experiment:

Introduction: In this experiment you will make three identical electromagnets with 3 different loop counts on their coils and then compare their strengths.
Materials:

  • 3 – 3″ long bolts with nuts
  • about 100 feet magnet wire or any insulated solid copper wire size gauge 22
  • 1 – 6-volt battery known as lantern battery.

Procedure:
1. Wrap some masking tape or paper on the bolts where you want to wind the wire.
2. Number the bolts from 1 to 3
3. Leave about 2 feet from the beginning of the wire and start winding 100 turns of wire on the bolt number 1, then leave another 2 feet and cut the wire.

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4. Wrap some tape on the coil so it does not unwind. Optionally twist the two hanging pieces together to make them more manageable.

If you don’t have access to 3″ bolts, you may use a large nail instead.

5. Remove insulation from both ends of the wire so they will be ready for connection to the battery.
6. Repeat the steps 3 to five with the two remaining bolts; however, wind 200 turns of wire on bolt number 2 and 300 turns of wire on bolt number 3.
7. Get an assistant to help you in the testing step. For each of the three electromagnets you have made, your assistant must connect the two ends of the wire to the poles of a 6 volt battery while you use the electromagnet to lift some small nails. Count or weigh the number of small nails and record that in your data table.
8. After testing the electromagnets 1, 2 and 3, go back and repeat your tests (at the same order) two more times.
9. Calculate the average weight of nails or the average number of nails each electromagnet could lift.
Warning: Do not keep the electromagnets connected to the battery for a long time. This can cause heating up the wires and discharging the battery. Limit each test to about 10 seconds.
Your data table may look like this:

ElectromagnetLoop countStrength test 1Strength test 2Strength test 3Average
1100
2200
3300

The strength is the mass of small nails (in grams) each electromagnet can lift. If you don’t have access to a small scale, the strength will be expressed as the number of small nails each electromagnet can lift.
The strongest electromagnet you have made may be hanged on a wooden crane to form the electromagnetic crane described below.

Term 2 grade 12 task 2 project life orientation memorandum 2022

Simple electromagnetic crane project grade 7 – Grade 7 technology project electromagnetic crane answers

Activity:Make an electromagnetic crane

Click Hereto see a simple, step by step procedure for constructing an electromagnetic crane.

Construction Details
The exact dimensions of each of the parts will depend upon the material available to you
and the specific design that you prepare. The components which make up the crane are shown in the following sketches. Yours can be different based on the material you have access to. Try to use your own ideas and make changes as needed.

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Points to consider

  • The angle of the jib can be varied by turning the pulley and varying the length of cord wound on the pulley. Similarly, the height of the magnet can be varied by turning the second pulley. (Jib=The arm of a mechanical crane)
  • The crane can be rotated by turning the tower on the base.
  • Experiment lifting different objects, varying the load for fixed positions of the jib. This would lead to an observation that light loads can be lifted with the jib almost horizontal while to lift heavy loads the jib must be getting closer to the vertical position.
  • You may observe that to lift heavier loads a stronger magnet is required which can lead on to an electric circuits project to investigate the relationship between voltage, current, and resistance, and also energy and power for your future projects.

Simple electromagnetic crane project grade 7 - Grade 7 technology project electromagnetic crane answers; Get good pdf here - Wakulimaforum (4)

Materials and Equipment:

Materials needed are as follows:
1. Wood indifferent shapes and sizes depending on your design and availability.
2. Nails
3. Screws
4. Bolts and nuts
5. Large nail
6. Hinge and other metal parts (From hardware store)
7. Thermostat wire (Insulated Solid wire #24, about 50 feet)
8. Other insulated solid wires with different thickness for test only (15 feet of each)
9. Knife switch, any other simple switch (optional)
10. 6 Volt battery (Known as lantern battery)
11. Empty spool

Results of Experiment (Observation):

Experiments are often done in series. A series of experiments can be done by changing one variable a different amount each time. A series of experiments is made up of separate experimental “runs.” During each run you make a measurement of how much the variable affected the system under study. For each run, a different amount of change in the variable is used. This produces a different amount of response in the system. You measure this response, or record data, in a table for this purpose. This is considered “raw data” since it has not been processed or interpreted yet. When raw data gets processed mathematically, for example, it becomes results.

Calculations:

No calculation is required for this project, however if you do any calculations, you must write them in your reports.
Among the calculations that you might do is to see the lift power of your electromagnet for two different battery voltages (1.5 volts and 3 volts) and then use these numbers to calculate how much will the lift power be with a 6 volts battery. Similar calculations can be done for the number of wire loops in your electromagnet.

Summery of Results:

Summarize what happened. This can be in the form of a table of processed numerical data, or graphs. It could also be a written statement of what occurred during experiments.
It is from calculations using recorded data that tables and graphs are made. Studying tables and graphs, we can see trends that tell us how different variables cause our observations. Based on these trends, we can draw conclusions about the system under study. These conclusions help us confirm or deny our original hypothesis. Often, mathematical equations can be made from graphs. These equations allow us to predict how a change will affect the system without the need to do additional experiments. Advanced levels of experimental science rely heavily on graphical and mathematical analysis of data. At this level, science becomes even more interesting and powerful.

Conclusion:

Using the trends in your experimental data and your experimental observations, try to answer your original questions. Is your hypothesis correct? Now is the time to pull together what happened, and assess the experiments you did.

FAQs

How do you make an electromagnet Grade 7? ›

You can make a simple electromagnet by winding insulated copper wire around an iron nail. The coiled copper wire is called a solenoid. When an electric current flows through the solenoid, it creates a magnetic field. The iron core amplifies this magnetic core.

How do you make a simple electromagnetic crane? ›

Put some very small pieces of iron. Below the electromagnet. As soon as you switch it on the bolt

What are the three main parts needed to make an electromagnet crane? ›

In an electromagnet, an electric current runs through a piece of metal and creates a magnetic field. To create a simple electromagnet, you'll need a source of electricity, a conductor, and metal.

How do you make an electromagnet Grade 8? ›

Electromagnets can be created by wrapping a wire around an iron nail and running current through the wire. The electric field in the wire coil creates a magnetic field around the nail. In some cases, the nail will remain magnetised even when removed from within the wire coil.

How does a Class 7 electromagnet work? ›

What is an electromagnet and how does it work? A magnet that consists of a piece of iron or steel surrounded by a coil is known as an electromagnet. The metal becomes magnetic when an electric current is passed through the coil.

What type of magnets are used in cranes? ›

Electromagnets are used in cranes to pick heavy metallic objects. Electromagnets are used in cranes to pick heavy metallic objects.

What tools are used to make a crane? ›

The many different components that will later be assembled into cranes are made using a variety of metalworking equipment. Lathes, drills, and other precision machines are used to shape the steel as required.

How does a crane magnet work? ›

Magnet Crane

They operate using a magnetic field that is formed by an electric current passing through windings around the magnet. The magnet is turned on and off when needed by the electric current. The electrical current travels through an electromagnet that consists of an iron middle with a wire enclosed.

What battery is best for an electromagnet? ›

standard electrical wire and telephone wire, will also work. of an electromagnet. Most iron or steel nails should work well. AAA, AA, C, and 9-volt, may be used if D cell batteries are not available.

How do you make an electromagnet stronger? ›

You can make an electromagnet stronger by doing these things: wrapping the coil around a piece of iron (such as an iron nail) adding more turns to the coil. increasing the current flowing through the coil.

How do you increase the strength of an electromagnet? ›

Solution: Strength of electromagnet: The strength of the electromagnet net can be increased: By increasing the current in the coil. By increasing the total number of turns of the coil.

What is a magnet Grade 7? ›

A magnet is a rock or a piece of metal that can pull certain types of metal toward itself. The force of magnets, called magnetism, is a basic force of nature, like electricity and gravity. Magnetism works over a distance. This means that a magnet does not have to be touching an object to pull it.

How do you make a magnet stronger with a battery? ›

When you connect the wire to the battery, electrons begin to flow in the same direction through the wire, and this generates a magnetic field around the wire. By coiling the wire around a stainless steel core, you're creating a combined magnetic field in the wire and core, which is strong enough to pick up objects.

What is a crane boom? ›

Cranes are typically used on many construction sites and are equipped with a crane boom which is used to help construct buildings or to tear them down. The crane boom is a long, fixed or hydraulic arm that is attached to the crane cab and is used to lift heavy objects, like palettes of bricks or constructed walls.

How do you make a class 10 electromagnet? ›

An electromagnet is made by winding an insulated copper wire around a soft iron core either in the shape of a solenoid or U-shape and passing current through it. The strength of magnetic field of an electromagnet depends on: The number of turns of wire wound around the coil, and.

What is an electromagnet Grade 8? ›

An electro magnet is a temporary magnet made by winding wire around an iron core. When current flows in the coil the iron becomes a magnet, and when the current is turned off it looses it's magnetic properties.

Why is my electromagnet getting hot? ›

Basically, electromagnets are coils of wire wrapped around a metal core, which in turn are connected to a battery. Although they are easy to make, they can have a problem with overheating if given more voltage than their wires can withstand.

What are 10 uses of electromagnets? ›

Electromagnets are widely used as components of other electrical devices, such as motors, generators, electromechanical solenoids, relays, loudspeakers, hard disks, MRI machines, scientific instruments, and magnetic separation equipment.

What are electromagnets write two uses of electromagnets Class 7? ›

Solution : (a) An electromagnet is a solenoid coil with a soft iron core. On passing current through solenoid it behaves as a magnet and on stopping current flow the magnetism is lost. <br> Electromagnets are used in electric door bell, transformer, electric cranes etc.

Why do we use iron for making an electromagnet and not steel Class 7? ›

Key points. Iron is easily magnetised and demagnetised. Steel is more difficult to magnetise and is not easily demagnetised.

Which magnet is used to lift heavy goods? ›

Electromagnets are temporary magents. The strength of an electromagnet can be varied by varying the current in the circuit. Electromagnets can be used to separate magnetic materials from the junk. In cranes, electromagnets are used to lift heavy loads.

What are the advantages of a magnetic crane? ›

Without a doubt, the biggest advantage of electromagnets on cranes is their versatility. Electromagnets allow industries like scrap yards to work at a much more efficient rate, and in turn, help them increase profits.

Which type of magnet is used in electric? ›

A permanent magnet is used in an electric bell.

Why is a crane called a crane? ›

Developed by the Greeks and named after a bird

The appearance of the lifting device, with its vertical column and a boom that usually points up at an angle and can rotate, recalls the long neck and beak of a standing bird, the crane.

What is the end of a crane called? ›

One of the largest parts of the crane is the boom. You can easily recognize this as the long steel arm that spans the length of the machine. This part of the crane begins at the operator's cabin and ends at the hook.

What is the top of a crane called? ›

Larger, heavier duty, purpose-built "truck-mounted" cranes are constructed in two parts: the carrier, often called the lower, and the lifting component, which includes the boom, called the upper.

Why electromagnet is used in cranes? ›

Why Use Electromagnets? In large industrial cranes, extremely strong electromagnets are used to lift heavy objects off the ground and transport them from one place to another.

How big is an electromagnetic crane? ›

Electromagnetic crane with carrier beam parameters: Load capacity: 5-50t. Span: 10.5-31.5 m. Lifting height: 6-16m.

How are cranes made? ›

Molten steel is transformed into the separate parts of the crane using a range of processes that are chosen depending on the individual part. For example, high pressure rollers are commonly used to create the steel plates and sheets. Precision cutting tools are then used to accurately shape and size each part.

Do electromagnets need a battery? ›

Electromagnets create a magnetic field through the application of electricity. When you introduce the current, either from a battery or another source of electricity, it flows through the wire. This creates a magnetic field around the coiled wire, magnetizing the metal as if it were a permanent magnet.

How long will a battery power an electromagnet? ›

If your electromagnet is designed for 40W at 12V, it will draw 3.33 A with the indicated battery, which is rated at 1.8 Ah. it will last at most 1/2 hour.

Why is copper not a magnetic material? ›

Copper and alloys primarily based upon copper are considered non-magnetic. This is because of its atomic structure. In nature, magnetism in metals is a result of an uneven distribution of electrons within the atomic structure of the magnetic material — electrons flow from one 'shell to the next and free to spin.

Which electromagnet is the strongest? ›

Explanation: The strongest continuous magnetic fields on Earth have been produced by Bitter magnets.

Which is a stronger electromagnet? ›

An electromagnet is stronger if there are more turns in the coil of wire or there is more current flowing through it. A bigger bar or one made of material that is easier to magnetize also increases an electromagnet's strength.

Does electricity make magnets stronger? ›

Increasing the amount of current flowing through the wire – The magnetic field is caused by the current flowing in the wire. The bigger the current the stronger the magnetic field and hence the stronger the electromagnet.

Why magnet is called magnet? ›

The word magnet was adopted in Middle English from Latin magnetum "lodestone", ultimately from Greek μαγνῆτις [λίθος] (magnētis [lithos]) meaning "[stone] from Magnesia", a place in Anatolia where lodestones were found (today Manisa in modern-day Turkey).

Where is a magnet the strongest? ›

It is strongest at the poles. So, what are magnetic poles? Magnetic poles are opposite ends of a magnet where the magnetic field is strongest.

Can you increase the strength of a magnet? ›

To recharge a magnet, find a very strong magnet and rub it across the weakened magnet repeatedly. This will realign the magnetic domains in the weak magnet. Another way to make weak magnets stronger is by stacking them. This can be tough, as magnets attract each other in opposite directions, which can weaken them.

How is an electromagnet made? ›

Electromagnets are made of coils of wire with electricity passing through them. Moving charges create magnetic fields, so when the coils of wire in an electromagnet have an electric current passing through them, the coils behave like a magnet.

How can you show that the electromagnet is temporary magnet class 7? ›

An electromagnet is called a temporary magnet because it produces magnetic field so long as current flows in its coil.

What is electromagnet short answer? ›

An electro magnet is a temporary magnet made by winding wire around an iron core. When current flows in the coil the iron becomes a magnet, and when the current is turned off it looses it's magnetic properties.

Which electromagnet is the strongest? ›

Explanation: The strongest continuous magnetic fields on Earth have been produced by Bitter magnets.

What material makes the best electromagnet? ›

Materials used for making electromagnets should have best magnetising and demagnetising property. Among Stainless Steel, silver, soft Iron and Nickel, Soft Iron has best magnetising and demagnetising property. Therefore, Soft Iron is most suitable.

How do you turn a nail into a magnet? ›

An iron or steel nail can be made into a magnet by stroking it repeatedly (at least 20 times) with a magnet in one direction only. Stroking in an anticlockwise direction with the North pole touching the head of the iron nail will make the head of the nail the North pole and its tip the South pole.

What battery is best for an electromagnet? ›

standard electrical wire and telephone wire, will also work. of an electromagnet. Most iron or steel nails should work well. AAA, AA, C, and 9-volt, may be used if D cell batteries are not available.

Do electromagnets need a battery? ›

Electromagnets create a magnetic field through the application of electricity. When you introduce the current, either from a battery or another source of electricity, it flows through the wire. This creates a magnetic field around the coiled wire, magnetizing the metal as if it were a permanent magnet.

What is a magnet Grade 7? ›

A magnet is a rock or a piece of metal that can pull certain types of metal toward itself. The force of magnets, called magnetism, is a basic force of nature, like electricity and gravity. Magnetism works over a distance. This means that a magnet does not have to be touching an object to pull it.

Are magnets permanent? ›

Magnets made of Neodymium Magnets (NdFeB), Samarium Cobalt (SmCo), AlNiCo, and Ferrite are generally referred to as permanent magnets, whereas electromagnets are commonly classed as non-permanent magnets.

Which magnet is a temporary magnet? ›

An electromagnet is called a temporary magnet because it produces magnetic field so long as current flows in its coil.

What is called electromagnet? ›

electromagnet, device consisting of a core of magnetic material surrounded by a coil through which an electric current is passed to magnetize the core. An electromagnet is used wherever controllable magnets are required, as in contrivances in which the magnetic flux is to be varied, reversed, or switched on and off.

How do you make a magnet stronger? ›

Rub the rod with two magnets, drawing the north pole of one magnet from the center of the rod to one end while you draw the south pole of the other magnet in the opposite direction. Hang the bar vertically and hit it repeatedly with a hammer. The magnetizing effect is stronger if you heat the rod.

Which activity uses an electromagnet? ›

In the home, by far the most common use of electromagnets is in electric motors. Think of all of those bits of electrical equipment with some kind of electric motor: vacuum cleaners, refrigerators, washing machines, tumble driers, food blenders, fan ovens, microwaves, dish-washers, hair driers.

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