Question 245: AC fundamentals

Question

The self inductance of the motor of an electric fan is $$10$$ $$H$$. In order to impart maximum power at $$50$$ $$Hz$$, it should be connected to a capacitance of

Accepted Answer

For maximum power, $${X_L} = X{}_C,$$ which yields
$$C = {1 \over {{{\left( {2\pi n} ight)}^2}L}} = {1 \over {4{\pi ^2} 	imes 50 	imes 50 	imes 10}}$$
$$	herefore$$ $$C = 0.1 	imes {10^{ - 5}}F = 1\mu F$$

Answer

$$8\mu F$$

Answer

$$4\mu F$$

Answer

$$2\mu F$$

Answer

$$1\mu F$$

AC fundamentals

The self inductance of the motor of an electric fan is $10 H. In order to impart maximum power at 50 Hz$, it should be connected to a capacitance of

Choose the correct answer: