Physics Practice: Magnetism (Mock Test 3 - Advanced Mastery)
1. The Earth's magnetic field at a point is horizontal. The angle of dip at that point is ________.
2. Magnetic field lines inside a bar magnet run from ________ to ________.
3. Which of the following happens when the current in an electromagnet is switched off?
4. The magnetic field strength of a solenoid increases if we ________.
5. A compass needle placed near the magnetic poles of Earth will stand ________.
6. Soft iron is used in electromagnets because it has ________ retentivity and ________ coercivity.
7. The tangent to a magnetic field line at any point gives the direction of ________ at that point.
8. Which of these is a way to demagnetize a magnet?
9. The magnetism of the Earth is thought to be caused by ________.
10. Neutral points are obtained when the external magnetic field is exactly ________ by the Earth's magnetic field.
11. If a magnet is placed with its North pole pointing towards geographic North, the neutral points lie on the ________.
12. The material Alnico is an alloy of ________.
13. Magnetic field lines are ________ near the poles of a magnet.
14. The horizontal component of Earth's magnetic field ($B_H$) is zero at ________.
15. An electric bell uses an ________ to hit the gong.
16. The vertical plane passing through the geographic axis is called ________.
17. Induced magnetism is ________ as long as the primary magnet is present nearby.
18. The strength of the magnetic field ________ as we move away from the magnet.
19. Magnetic field lines form ________ loops.
20. Steel is difficult to magnetize but ________ its magnetism for a long time.
