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The impedance of a series R-L circuit is same as that of a series R-C circuit when connected to the same AC source separately, keeping the same resistance. The frequency of the source is

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Important Questions on Alternating Current

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Chapterwise/Topicwise Daily Practice Problems (DPP) Magnetism and Electromagnetic Induction NEET>Chapter 4 - Alternating Current>Types of AC circuit>Q 49

A high impedance A.C voltmeter is connected in turn across the inductor, the capacitor and the resistor in a series circuit having an A.C source of

100 V (rms)

and gives the same reading in volts in each case. This reading is:

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Chapterwise/Topicwise Daily Practice Problems (DPP) Magnetism and Electromagnetic Induction NEET>Chapter 4 - Alternating Current>Types of AC circuit>Q 50

For the series circuit shown in the figure, the voltmeter reading will be: (All the meters are ideal.)

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Chapterwise/Topicwise Daily Practice Problems (DPP) Magnetism and Electromagnetic Induction NEET>Chapter 4 - Alternating Current>Types of AC circuit>Q 51

Current in an AC circuit is given by,

i = 3 \sin (ω t) + 4 \cos (ω t)

. Then

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Chapterwise/Topicwise Daily Practice Problems (DPP) Magnetism and Electromagnetic Induction NEET>Chapter 4 - Alternating Current>Types of AC circuit>Q 52

A series RLC circuit consists of

8.0 Ω

resistor,

5.0 μF

capacitor and

50.0 mH

inductor. A variable frequency source applies an emf of

400 V

(rms) across the combination. The power delivered to the circuit when the frequency is equal to one-half the resonant frequency is

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Chapterwise/Topicwise Daily Practice Problems (DPP) Magnetism and Electromagnetic Induction NEET>Chapter 4 - Alternating Current>Types of AC circuit>Q 53

In a given A.C circuit, the voltage applied is

E = E_{0} \sin ω t

. The resulting current in the circuit is

I = I_{0} \sin (ω t - \frac{π}{2})

. The power consumption in the circuit is:

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Chapterwise/Topicwise Daily Practice Problems (DPP) Magnetism and Electromagnetic Induction NEET>Chapter 4 - Alternating Current>Types of AC circuit>Q 54

In a series

L C R

circuit,

R = 200 Ω

and the voltage and the frequency of the main supply with rms value

220 V

and

50 Hz

as frequency, respectively. On taking out the capacitance from the circuit, the current lags behind the voltages by

30 °

. On taking out the inductor from the circuit, the current leads the voltage by

30 °

. The power dissipated in the

L C R

circuit is:

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Chapterwise/Topicwise Daily Practice Problems (DPP) Magnetism and Electromagnetic Induction NEET>Chapter 4 - Alternating Current>Types of AC circuit>Q 55

A fully charged capacitor

C

with initial charge

q_{0}

is connected to a coil of self inductance

L

t = 0

. The time at which the energy is stored equally between the electric and magnetic fields is:

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Chapterwise/Topicwise Daily Practice Problems (DPP) Magnetism and Electromagnetic Induction NEET>Chapter 4 - Alternating Current>Types of AC circuit>Q 56

When a voltage

V_{S} = 200 \sqrt{2} \sin (ω t + 15 °) volt

is applied to an A.C circuit, the current in the circuit is found to be

i = 2 \sin (ω t + \frac{π}{4}) A

. The average power consumed in the circuit is:

The impedance of a series R-L circuit is same as that of a series R-C circuit when connected to the same AC source separately, keeping the same resistance. The frequency of the source is

Important Questions on Alternating Current

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