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IMPORTANT

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For series $L - C - R$ $A C$ circuit shown in figure, the readings of $V_{2}$ and $V_{3}$ are same and each equal to $100 V$ . Then,

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Important Questions on Alternating Current

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JEE Advanced

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 6 - Alternating Current>[ Level 2 ]>Q 3

When an $A C$ voltage, of variable frequency is applied to series $L - C - R$ circuit, the current in the circuit is the same at $4 kHz$ and $9 kHz$ . The current in the circuit is maximum at

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 6 - Alternating Current>[ Level 2 ]>Q 4

When

100 V D C

is applied across a solenoid, a current of

1 A

flows in it. When

100 V A C

is applied across the same solenoid the current drops to

0.5 A

. If the frequency of the

A C

source is

50 Hz,

the impedance and inductance of the solenoid are

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JEE Advanced

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 6 - Alternating Current>[ Level 2 ]>Q 5

An inductor $L$ and a capacitor $C$ are connected in the circuit as shown in the figure. Which ammeter will read zero ampere?

(where $ω$ is the resonant frequency of the circuit. )

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 6 - Alternating Current>[ Level 2 ]>Q 6

An ideal choke takes a current of

8 A

when connected to

100 V

A C

source of and

50 Hz

. A pure resistor under the same conditions takes a current of

10 A

. If two are connected in series to an

A C

supply of

100 V

and

40 Hz

then the current in the series combination of the above resistor and inductor is

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JEE Advanced

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 6 - Alternating Current>[ Level 2 ]>Q 7

A C

source is connected with a resistance

(R)

and an uncharged capacitance

(C)

, in series. The potential difference across the resistor is in phase with the initial potential difference across the capacitor for the first time at the instant (assume that at

t = 0, emf

is zero).

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JEE Advanced

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 6 - Alternating Current>[ Level 2 ]>Q 8

Current through an

A C

series

L - C - R

circuit is

2 A,

if operated at resonant frequency and

1 A

if operated at

50 %

less than resonant frequency. The current (in

A

) if the frequency is

100 %

more than the resonant frequency, is

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JEE Advanced

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 6 - Alternating Current>[ Level 2 ]>Q 9

For an $A C$ circuit containing capacitor only, the applied $A C$ voltage waveform is shown in figure.

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JEE Advanced

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 6 - Alternating Current>[ Level 2 ]>Q 10

In the given figure, which voltmeter will read zero voltage at resonant frequency?

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For series L-C-R AC circuit shown in figure, the readings of V2 and V3 are same and each equal to 100 V. Then,

Important Questions on Alternating Current

Learn and Prepare for any exam you want !

For series $L - C - R$ $A C$ circuit shown in figure, the readings of $V_{2}$ and $V_{3}$ are same and each equal to $100 V$ . Then,