AIEEE 2004 | Alternating Current Question 185 | Physics

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

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 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

$$L/2$$

$$2L$$

$$4L$$

$$L/4$$

AIEEE 2003

MCQ (Single Correct Answer)

-1

The core of any transformer is laminated so as to

reduce the energy loss due to eddy currents

make it light weight

make it robust and strong

increase the secondary voltage