31. |
Two very long conducting parallel wires are separated by a distance d from each other and equal currents are passed through them in mutually opposite directions. A particle of charge q passes through a point, at a distance from both wires, with velocity v perpendicularly to the plane formed by the wires. The resultant magnetic force acting on this particle is _____ .
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Answer:
Option (d) |
32. |
A very long solenoid of length L has n layers. There are N turns in each layer. Diameter of the solenoid is D and it carries current I. The magnetic field at the centre of the solenoid is _____ .
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Answer:
Option (c) |
33. |
The angular speed of the charged particle is independent of _____ .
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Answer:
Option (b) |
34. |
A charged particle gains energy due to _____ .
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Answer:
Option (a) |
35. |
A charged particle is moving with velocity in a uniform magnetic field . The magnetic force acting on it will be maximum when _____ .
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Answer:
Option (c) |
36. |
Equal currents are passing through two very long and straight parallel wires in mutually opposite directions. They will _____ .
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Answer:
Option (b) |
37. |
A charged particle is moving in a uniform magnetic field. Then _____ .
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Answer:
Option (a) |
38. |
If the speed of a charged particle moving through a magnetic field is increased, then the radius of curvature of its trajectory will _____ .
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Answer:
Option (b) |
39. |
Magnetic field produced at the centre of circular coil having radius 0.1 m and 2 turns is _____ if A current passes through it.
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Answer:
Option (c) |
40. |
Maximum magnetic field on electron moving with velocity 4 x 104 m/s is _____ when it moves in magnetic field having intensity 5 x 10-5 T.
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Answer:
Option (b) |