Unit of power is:

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Watt per second

Joule

Watt

None of these

answer is C.

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Detailed Solution

Concept: Since we can compute the unit of power from the formula, we will go forward and write it down.
According to the definition of power, it is the speed at which energy is transported, converted, or used to perform work.
The formula of can be used to determine the power,

P = \frac{W}{T}

P = power, W = work, and T = time.
The power, which has no direction, is a scalar quantity that is essentially the amount of energy spent per unit of time.
Watts are a unit of power:

1 W = 1 \frac{j}{s}

\frac{kg \times m^{2}}{s^{2}}

= 1 \frac{n \times m}{s}

1 watt = 1 \frac{j}{s} = 1 kg \times \frac{m^{2}}{s^{2}}

According to accepted standards, the Watt, denoted by the letter W, is the only S.I. unit of power. By giving the watt (W) his name, Jame Watt's contribution to industry efficiency was recognized.
Hence, the correct option is 3.

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