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Class 12 Physics Practice Test: Bar Magnet
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Avg score: 80% • Most missed: “A magnet can only repel another magnet. So, ‘X’ is a surer test of magnetism. Id…”

A bar magnet refers to a magnet with a bar shape and magnetic poles at both ends.

Class 12 Physics Practice Test: Bar Magnet
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10 Questions

1. A magnet can only repel another magnet. So, ‘X’ is a surer test of magnetism. Identify X.
2. A magnetized needle of the magnetic moment 20 JT-1 is placed at 60o with the direction of the uniform magnetic field of magnitude 9 T. What is the torque acting on the needle?
3. Identify the direction in which a thin long piece of magnet comes to rest when suspended freely.
4. Identify the direction in which a thin long piece of magnet comes to rest when suspended freely.
5. Which among the following is not attracted by magnets?
6. Magnetic lines of force always form open loops. State true or false.
7. A magnetized needle of the magnetic moment 20 JT-1 is placed at 60o with the direction of the uniform magnetic field of magnitude 9 T. What is the torque acting on the needle?
8. A bar magnet of the magnetic moment 5 Am2 has poles 20 cm apart. Calculate the pole strength.
9. A magnetic dipole of length 10 cm has pole strength of 20 Am. Find the magnetic moment of the dipole.
10. Which of the following is not a basic property of magnets.

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