Beta Question Bank for Medical: Physics>Chapter 28 - Alternating Current>Exercise (Conceptual Questions)>Q 78

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In an a.c. circuit $V$ and $I$ are given by $V = 200 \sin (100 t)$ volts $I = 50 \sin (100 t + π / 3) mA$
The power dissipated in the circuit is

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Important Questions on Alternating Current

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Beta Question Bank for Medical: Physics>Chapter 28 - Alternating Current>Exercise (Conceptual Questions)>Q 79

For a series LCR circuit the power loss at resonance is :-

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Beta Question Bank for Medical: Physics>Chapter 28 - Alternating Current>Exercise (Conceptual Questions)>Q 80

In an alternating circuit applied voltage and flowing current are E = E₀ sin

ω

t and I = I₀ sin(

ω

t +

π

/2) respectively. Then the power consumed in the circuit will be :

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Beta Question Bank for Medical: Physics>Chapter 28 - Alternating Current>Exercise (Conceptual Questions)>Q 81

In which of the following case power factor will be negligible :-

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Beta Question Bank for Medical: Physics>Chapter 28 - Alternating Current>Exercise (Conceptual Questions)>Q 82

If V = 100 sin100t volt, and I = 100 sin

(100 t + \frac{π}{6})

A. ,then find the watt less power in watt :-

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Beta Question Bank for Medical: Physics>Chapter 28 - Alternating Current>Exercise (Conceptual Questions)>Q 83

An A.C. supply gives 30V r.m.s. which passes through a 10

Ω

, resistance. The power dissipated in it is :-

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Beta Question Bank for Medical: Physics>Chapter 28 - Alternating Current>Exercise (Conceptual Questions)>Q 84

An inductor of inductance

L

and resistor of resistance

R

are joined in series and connected by a source of frequency

ω .

Power dissipated in the circuit is :-

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Beta Question Bank for Medical: Physics>Chapter 28 - Alternating Current>Exercise (Conceptual Questions)>Q 85

For given circuit the power factor is:
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Beta Question Bank for Medical: Physics>Chapter 28 - Alternating Current>Exercise (Conceptual Questions)>Q 86

In a purely capacitive circuit, average power dissipated in the circuit is-