Assertion : Power of machine gun is determined by both, the number of bullet fired per second and kinetic energy of bullets.Reason : Power of any machine is defined as work done (by it) per unit time.

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If both assertion and reason are true and reason is a true explanation of assertion.

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false.

If both assertion and reason are false.

answer is A.

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Detailed Solution

KE of one bullet = k and KE of n bullet = nkAccording to law of conservation of energy, the kinetic energy of bullets be equal to the work done by machine gun per sec.

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