Beta Question Bank for Medical: Physics>Chapter 28 - Alternating Current>Exercise (Conceptual Questions)>Q 72

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In LCR circuit, the voltage across the terminals of resistance, inductance and capacitance are $40 V, 30 V$ and $60 V$ , then the voltage across the main source will be -

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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 73

For an alternating current of frequency

\frac{500}{π} Hz

in L- C-R series circuit with

L = 1 H, C = 1 µ F, R = 100 Ω

, impedance is,

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Beta Question Bank for Medical: Physics>Chapter 28 - Alternating Current>Exercise (Conceptual Questions)>Q 74

A sinusoidal A.C. current flows through a resistor of resistance

R

. If the peak current is

I_{p},

then the power dissipated is

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Beta Question Bank for Medical: Physics>Chapter 28 - Alternating Current>Exercise (Conceptual Questions)>Q 75

An AC circuit draws

5 A

at

160 V

and the power consumption is

600 W

. Then the power factor is:-

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Beta Question Bank for Medical: Physics>Chapter 28 - Alternating Current>Exercise (Conceptual Questions)>Q 76

Which is not correct for average power

P

at resonance?

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

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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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 :-