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Q.

Assertion(A) : Magnetic field cannot change kinetic energy of a moving charge 
Reason(R): Magnetic field can’t change velocity vector

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a

A & R is true, R is correct explanation of A

b

A & R is true, R is not correct explanation of A

c

A is true, R is false

d

A is false, R is true 

answer is C.

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Detailed Solution

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Work done on particle by magnetic force is zero. But, particle direction is changed by magnetic force.

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