Write a short note on the temporary magnet.

Important Questions on Magnets

HARD

Science>Physics>Magnets>Electromagnets

What must happen for an electromagnet to have a magnetic field?

MEDIUM

Science>Physics>Magnets>Electromagnets

What would you use to lift a tiny piece of iron accidentally fallen in your eye?

EASY

Science>Physics>Magnets>Electromagnets

The effect of current on which the electric bell is based is known as

EASY

Science>Physics>Magnets>Electromagnets

Choose materials suitable for making the core of an electromagnet.

EASY

Science>Physics>Magnets>Electromagnets

Which of the statement given below correctly describes the magnetic field near a long, straight current-carrying conductor?

EASY

Science>Physics>Magnets>Electromagnets

Which of the following correctly describes the magnetic field near a long straight wire?

EASY

Science>Physics>Magnets>Electromagnets

AB is a current-carrying conductor in the plane of the paper as shown in figure. What are the directions of magnetic fields produced by it at points P and Q? Given $r_{1} > r_{2}$ , where will the strength of the magnetic field will be larger?

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MEDIUM

Science>Physics>Magnets>Electromagnets

Electric bell works on the principle of _____ effect of electric current.

HARD

Science>Physics>Magnets>Electromagnets

Where is an electric crane used?

EASY

Science>Physics>Magnets>Electromagnets

Which of these appliances does not use an electromagnet?

EASY

Science>Physics>Magnets>Electromagnets

What is the relationship between a current in a wire and a magnetic field?

EASY

Science>Physics>Magnets>Electromagnets

Which of the following is the most suitable material for core of an electromagnet?

EASY

Science>Physics>Magnets>Electromagnets

If the key in the arrangement as shown below is taken out (the circuit is made open) and magnetic field lines are drawn over the horizontal plane ABCD, the lines are:

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