Two coaxial solenoids of different radii carry current \(I\) in the same direction. Let \(\;{\overrightarrow {\;F} _1}\) be the magnetic force on the inner solenoid due to the outer one and \(\;{\overrightarrow {\;F} _2}\) be the magnetic force on the outer solenoid due to the inner one. Then

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Correct Answer

(D) \(\overrightarrow {{F_1}} =\overrightarrow {\;{F_2}} =0\)

Step-by-step Solution

Detailed explanation

(Both solenoids are taken to be ideal in nature.)

Both wires will attract each other, but net force on each wire will be zero.

Concept: Two current carrying elements attract each other if direction of current is same.

\(\overrightarrow {{F_1}} =\overrightarrow {\;{F_2}} =0\)

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