Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>Assignment Set-2>Q 14

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Switch is in position $A$ for long time $.$ At time $t = 0$ it is shifted to position $B$ $.$ Find the maximum charge that will accumulate on capacitor $.$

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Important Questions on Alternating Current

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Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>Assignment Set-2>Q 15

In the $L C$ circuit, at this time

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Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>Assignment Set-2>Q 16

An

L C

series circuit has an oscillation frequency

f .

Two isolated inductors, each with inductance

L

and two capacitors each with capacitance

C

.

all are connected in series and circuit is completed. The oscillation frequency is

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Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>Assignment Set-2>Q 17

In an $L C$ circuit shown in figure, if the switch is closed at $t = 0$ , find the equation for instantaneous current in $mA . Q_{\max} = 100 μ C, L = 40 mH, C = 100 μ F$

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Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>Assignment Set-2>Q 18

A transformer has 500 primary turns and 10 secondary turns. If

V_{p}

is

120 V (rms)

and a resistive load of

15 Ω

is connected across the secondary, the currents in the primary and secondary coil of transformer are

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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 20

If the emf of the $A C$ source in the figure is $ε = 10 \sqrt{2} \sin 100 π t$ , where $ε$ is in volt and $t$ is in second, then the expression for the current (in ampere) in the circuit is

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

If the reading of voltmeters $V_{1}$ and $V_{2}$ each is $25 V$ then the reading of voltmeter $V_{3}$ will be

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Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>Assignment Set-2>Q 22

What is the effective value (RMS value) of current

\hat{i} = 10 \sin 100 π t + 10 \cos (100 π t + 30 °)

, where

i

is in ampere?