The magnetic force between a moving charge and a second charge is always zero if the second charge
A) is at rest.
B) moves along the line joining the two charges.
C) Both of the first two responses are valid.
D) Neither of the first two responses is valid.

Question

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The Answer of The magnetic force between a moving charge and a second charge is always zero if the second charge
A) is at rest.
B) moves along the line joining the two charges.
C) Both of the first two responses are valid.
D) Neither of the first two responses is valid.

The Magnetic Force Between a Moving Charge and a Second