Assertion :Power of a engine depends on mass, angular speed, torque and angular momentum, then the formula of power is not derived with the help of dimensional method. Reason: In mechanics, if a particularly quantity depends on more than three quantities, then we can not drive the formula of the quantity by the help of dimensional method.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
The assertion is correct as we cant derive formula with help of dimensional analysis if quantity depends on more then 3 quantities, here power depends on 4 quantities so we cant derive its formula by dimensional method.

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