A wind electric generator is generating electrical power which flow an electric current of 2 Amp through a circut of 50 ohm. If the power of wind is 200 watt Then the efficiency of windmill is
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The efficiency of the windmill is 100 %.
Explanation:
The efficiency of a body is the percentage of the work done at input being converted to the work done at the output .
The power of the windmill is 200 W.
We know that the power of the body is the product of potential difference and the current.
By Ohm's Law we have :
⇒ P = I²R
Current flowing .
Resistance of the circuit Ω
The power generated or the power output is 200 W.
Let the time for which the work is done by T.
Power is the rate of doing work which is :
Work input
Work output
Efficiency = work output / work input × 100 %
The efficiency of windmill is 100 % .
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