AIEEE 2006 | Alternating Current Question 159 | Physics

In a series resonant $$LCR$$ circuit, the voltage across $$R$$ is $$100$$ volts and $$R = 1\,k\Omega $$ with $$C = 2\mu F.$$ The resonant frequency $$\omega $$ is $$200$$ $$rad/s$$. At resonance the voltage across $$L$$ is

$$2.5 \times {10^{ - 2}}V$$

$$40$$ $$V$$

$$250$$ $$V$$

$$4 \times {10^{ - 3}}V$$

AIEEE 2005

MCQ (Single Correct Answer)

-1

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

$$8\mu F$$

$$4\mu F$$

$$2\mu F$$

$$1\mu F$$

AIEEE 2005

MCQ (Single Correct Answer)

-1

The phase difference between the alternating current and $$emf$$ is $${\pi \over 2}.$$ Which of the following cannot be the constituent of the circuit?

$$R,L$$

$$C$$ alone

$$L$$ alone

$$L, C$$

AIEEE 2005

MCQ (Single Correct Answer)

-1

A circuit has a resistance of $$12$$ $$ohm$$ and an impedance of $$15$$ $$ohm$$. The power factor of the circuit will be

$$0.4$$

$$0.8$$

$$0.125$$

$$1.25$$