AIEEE 2005 | Alternating Current Question 161 | Physics

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

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

$$0.4$$

$$0.8$$

$$0.125$$

$$1.25$$

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 2004

MCQ (Single Correct Answer)

-1

Alternating current can not be measured by $$D.C.$$ ammeter because

Average value of current for complete cycle is zero

$$A.C.$$ Changes direction

$$A.C.$$ can not pass through $$D.C.$$ Ammeter

$$D.C.$$ Ammeter will get damaged.