A charged particle moves through uniform electric and magnetic fields, and the e

Question

A charged particle moves through uniform electric and magnetic fields, and the electric force and the magnetic force happen to cancel. If we somehow increase the particle’s speed, which is true about the forces?

Select one:

a. The magnetic force is now zero, but the electric force is not

b. The forces still cancel.

c. Both forces are now zero

d. Both forces increase

e. The electric force is now greater than the magnetic force.

f. The magnetic force is now greater than the electric force.

g. There is not enough information to answer the question

h. The electric force is now zero, but the magnetic force is not

i. Both forces decrease

Explanation / Answer

here,

electric force , Fe = q * E

magnetic force , Fm = q * ( v X B)

when the particle's speed increases

the magnetic force increases

and the electric force remains the same

f) the magnetic force is now greater than the electric force

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