If the units of length and force are doubled of its existing units, then the increment in the unit of power will be

Options

A. two times
B. four times
C. six times
D. remains unchanged

Answer

B

Explanation

We know that,
Power, `P = F xx v = (F xx L )/(T) [because v = L //T]`
According to the question,
New unit `= (2F xx 2 L )/(T) = 4 ( FL )/(T) = 4 P`
Hence , the unit becomes four times more.