A charged particle moving at constant speed is entering a region of uniform magn

Question

A charged particle moving at constant speed is entering a region of uniform magnetic field and follows the curved path shown in the diagram. Consider each of the following changes to this situation and select the effect it will have, from the choices given below. i. The initial velocity of the particle is doubled. ii. The direction of the magnetic field is reversed. iii. The magnetic field strength is reduced to one third. iv. The particle is replaced by one with twice the charge. E.g. , if change 1 causes B, change 2 causes A, change 3 causes C, and change 4 causes C, enter BACC. You have 15 tries. A. This will alter only the direction of the magnetic force on the particle. B. This will only increase the magnitude of the magnetic force on the particle. C. This will only decrease the magnitude of the magnetic force on the particle. D. This will alter both the magnitude and direction of the magnetic force on the particle. E. This will not affect the magnetic force on the particle.

Explanation / Answer

here,

1)

The initial velocity of the particle is doubled. then B) This will only increase the magnitude of the magnetic force on the particle.

when

2) the direction of magnetic feild is reversed

A. This will alter only the direction of the magnetic force on the particle.

3)

when the magnetic feild strength is reduced to one third

C) this will only decrease the magnitude of magnetic force

4)

when the particle is replaced with a particle having twice the charge

B) This will only increase the magnitude of the magnetic force on the particle.

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