The distance of two points on the axis of a magnet from its centre is 10 cm and 20 cm respectively. The ratio of magnetic intensity at these points is 12.5 : 1. The length of the magnet will be
| (a) 5 cm | (b) 25 cm | (c) 10 cm | (d) 20 cm |
Question types
Magnetism question types
304 questions across 1 question group — pick any mix to generate a Physics paper with step-by-step answer keys.
304
Questions
1
Question groups
5
Question types
Sample Questions
Magnetism questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Curie temperature is the temperature above which
|
(a) A paramagnetic material becomes ferromagnetic |
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(b) A ferromagnetic material becomes paramagnetic |
| (c) A paramagnetic material becomes diamagnetic |
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(d) A ferromagnetic material becomes diamagnetic |
In a vibration magnetometer, the time period of a bar magnet oscillating in horizontal component of earth's magnetic field is 2 sec. When a magnet is brought near and parallel to it, the time period reduces to 1 sec. The ratio H/F of the horizontal component H and the field F due to magnet will be
| (a) 3 | (b) 1/3 |
(c) 
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(d) 1/
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Two short magnets placed along the same axis with their like poles facing each other repel each other with a force which varies inversely as
| (a) Square of the distance | (b) Cube of the distance |
| (c) Distance | (d) Fourth power of the distance |
The magnetic moment of atomic neon is
| (a) Zero | (b) μB/2 | (c) μB | (d) 3μB/2 |
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