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What is hysteresis loop with its help explain the terms retentivity and coercivity?

Important Questions on Magnetism

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Science>Physics>Magnetism>Magnetic Induction
A magnet attracts :
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Science>Physics>Magnetism>Magnetic Induction
Which of the following materials is made of a non-magnetic substance? 
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Science>Physics>Magnetism>Magnetic Induction

Look at the magnetic pendulum. The pendulum has a magnet and there are a few magnets on the board too. The pendulum does not move in a fixed direction. What is the reason behind it?

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Science>Physics>Magnetism>Magnetic Induction
Find out and explain the usefulness of a compass in finding directions.
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Science>Physics>Magnetism>Magnetic Induction
What is a magnetic compass? 
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Science>Physics>Magnetism>Magnetic Induction
A magnet can attract all types of materials.
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Science>Physics>Magnetism>Magnetic Induction
Bigger magnets are stronger magnets. Is it correct?
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Science>Physics>Magnetism>Magnetic Induction
How will you prepare your own magnetic compass?
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Science>Physics>Magnetism>Magnetic Induction
A magnet will pick up a:
HARD
Science>Physics>Magnetism>Magnetic Induction
Find out information on magnetic levitation and its applications. 
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Science>Physics>Magnetism>Magnetic Induction
A recycling centre has a problem. Somehow the iron cans have got mixed up with the aluminium cans, and they look identical! You have been given the responsibility to segregate them. How will you do it?
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Science>Physics>Magnetism>Magnetic Induction
Write two uses of magnets.
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Science>Physics>Magnetism>Magnetic Induction
Magnets should not be placed near a:
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Science>Physics>Magnetism>Magnetic Induction
Give some examples of magentic, and non-magnetic materials. 
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Science>Physics>Magnetism>Magnetic Induction
Before the invention of a compass, sailors used stars to find direction. In what way is using compass better?
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Science>Physics>Magnetism>Magnetic Induction
What are magnetic and non-magnetic materials? Give examples of each.
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Science>Physics>Magnetism>Magnetic Induction
Magnetite is a type of mineral that can attract iron.
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Science>Physics>Magnetism>Magnetic Induction
Why does the door of refrigerator left slightly open, shut automatically?
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Science>Physics>Magnetism>Magnetic Induction
Why does a freely suspended magnet point in the north-south direction?
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Science>Physics>Magnetism>Magnetic Induction
Which of these is a non-magnetic material?