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Alternating Current

An inductor of reactance 1 and a resistor of 2 are connected

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Which of the following combinations should be selected for better tuning of an

L - C - R

circuit used for communication?

An inductor of reactance

1Ω

and a resistor of

2Ω

are connected in series to the terminals of a

6 V

(rms) AC source. The power dissipated in the circuit is

The output of a step-down transformer is measured to be

24 V

when connected to a

12 W

light bulb. The value of the peak current is

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Question

Medium

Solving time: 3 mins

An inductor of reactance $1Ω$ and a resistor of $2Ω$ are connected in series to the terminals of a $6 V$ (rms) AC source. The power dissipated in the circuit is

8 W

12 W

14.4 W

18 W

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Updated on: Apr 27, 2023

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Physics Exemplar (NCERT Exemplar)

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Scarlett Discussed

An inductor of reactance

1Ω

and a resistor of

2Ω

are connected in series to the terminals of a

6 V

(rms) AC source. The power dissipated in the circuit is

7 mins ago

Discuss this question LIVE

7 mins ago

Text solutionVerified

Given, X_{L} = 1Ω, R = 2Ω E_{rms} = 6 V, P_{av} = ?

Average power dissipated in the circuit

P_{av} I_{rms} Z I_{rms} cos ϕ P_{av} = E_{rms} I_{rms} cos ϕ \dots (i) = \frac{I _{0}}{2} = \frac{E _{rms}}{Z} = R^{2} + X_{L}^{2} = 4 + 1 = 5 = \frac{6}{5} A = \frac{R}{Z} = \frac{2}{5} = 6 \times \frac{6}{5} \times \frac{2}{5} from Eq. \dots (i) = \frac{72}{5 5} = \frac{72}{5} = 14.4 W

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Practice more questions from Physics Exemplar (NCERT Exemplar)

Which of the following combinations should be selected for better tuning of an

L - C - R

circuit used for communication?

An inductor of reactance

1Ω

and a resistor of

2Ω

are connected in series to the terminals of a

6 V

(rms) AC source. The power dissipated in the circuit is

The output of a step-down transformer is measured to be

24 V

when connected to a

12 W

light bulb. The value of the peak current is

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Question Text	An inductor of reactance $1Ω$ and a resistor of $2Ω$ are connected in series to the terminals of a $6 V$ (rms) AC source. The power dissipated in the circuit is
Updated On	Apr 27, 2023
Topic	Alternating Current
Subject	Physics
Class	Class 12
Answer Type	Text solution:1 Video solution: 4
Upvotes	652
Avg. Video Duration	3 min

An inductor of reactance $1Ω$ and a resistor of $2Ω$ are connected in series to the terminals of a $6 V$ (rms) AC source. The power dissipated in the circuit is

Text solutionVerified

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