Question

A wind electric generator is generating electrical power which flow an electric current of 2 Amp through a circuit of 50 n If the power of wind is 200 watt
Then the efficiency of wind mill is
Options
5%
12%
35%
50%​

Answer 1

Answer:

The correct answer is 100%. The efficiency of the wind mill will be 100% according to the given condition.

Explanation:

The electric current flowing through the circuit is: 2 Amp

Power of the wind mill is 200 W .

Efficiency is the capacity to produce something while exerting the least amount of effort possible. Power is the quantity of energy that is transferred in a useful manner as well as the rate at which energy is delivered.

We are aware that the body's power is a result of potential difference and current.

P = I × V

Where I is current and V is the potential difference.

Through Ohm's law, we know that V = I × R

Therefore, we can say that P = (IR) × I

P = $I^{2}R$

Resistance through the circuit is: 50 ohm

P = $(2)^{2}$ × 50

P= 4 × 50

P = 200 W

The power generated on the power output is 200W

We can define power as the rate of doing work, and we know that:

P = $\frac{workdone}{time}$

Let the time for which the work is done be T , Therefore work done(w) = P × T

Work input = 200 × T ⇒ 200 T

Work output = 200 × T ⇒ 200 T

Efficiency(η) = output work / input work × 100

η = $\frac{200}{200}$ × 100

Therefore, the efficiency is 100%

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