Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>EXERCISE 7.1>Q 2

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A $100 V$ ac circuit with frequency $50 Hz$ is applied across a resistance of $10 Ω$ and capacitor of $500 μ F .$ Find current and phase difference between voltage and current.

Important Questions on Alternating Current

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Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>EXERCISE 7.2>Q 14

For a

LCR

series circuit with an

A . C .

source of angular frequency

ω :

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Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>EXERCISE 7.3>Q 15

Switch is in position $A$ for a long time. At time $0$ , it is switched to position $B .$ Find time period of resulting charge oscillation.

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Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>EXERCISE 7.3>Q 17

Two capacitor with initial charges $C V_{0}$ and $2 C V_{0}$ as shown in figure are connected across an inductor of inductance $L .$ Find time period of oscillation and maximum current through the circuit

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Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>EXERCISE 7.1>Q 6

EMF, applied and current in an A.C. circuit are

E = 10 \sqrt{2} \sin ω t V

and

I = 5 \sqrt{2} \cos ω t A

respectively. The average power loss in the circuit is,

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Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>EXERCISE 7.2>Q 10

For which set of values of

X_{L}, X_{C}

and

R

, a series LCR circuit will be in resonance?

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Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>Assignment Set-2>Q 19

For a series

LCR

circuit, for two different angular frequency of

A . C .

supply system

ω_{1}

, and

ω_{2}

(ω_{2} > ω_{1})

power factor of the circuit is same. Angular resonance frequency of the circuit is

ω_{0} = 12

(SI unit). If

ω_{1} + ω_{2} = 25

(SI unit) then find the value of

(ω_{2} - ω_{1})

in

rad s^{- 1}

.

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Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>Assignment Set-2>Q 37

An

RLC

series circuit is driven by a sinusoidal emf with angular frequency

ω .

If

ω

is increased without changing the amplitude of the emf the current amplitude increases. It means

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Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>Assignment>Q 1

The resonance frequency of a certain

R L C

series circuit is

ω_{0}

. A source of angular frequency

2 ω_{0}

is inserted into the circuit. After transients die out, the angular frequency of current oscillation is