AIEEE 2005 | Alternating Current Question 160 | Physics

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.

AIEEE 2004

MCQ (Single Correct Answer)

-1

In an $$LCR$$ series $$a.c.$$ circuit, the voltage across each of the components, $$L,C$$ and $$R$$ is $$50V$$. The voltage across the $$L.C$$ combination will be :

$$100V$$

$$50\sqrt 2 $$

$$50$$ $$V$$

$$0$$ $$V$$ (zero)

AIEEE 2004

MCQ (Single Correct Answer)

-1

In a $$LCR$$ circuit capacitance is changed from $$C$$ to $$2$$ $$C$$. For the resonant frequency to remain unchaged, the inductance should be changed from $$L$$ to

$$L/2$$

$$2L$$

$$4L$$

$$L/4$$

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