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Magnetic induction inside the solenoid is ‘B’.

Work done on an electron moving in a solenoid along its axis is equal to

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none of the above

-evB

zero

i/B

answer is A.

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Detailed Solution

$\vec{B} = μ_{0} n i \hat{i},$ $v = v \hat{i}$

F = (-e) $(\vec{v} \times \vec{B}) = 0$

W = 0

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