Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 6 - Alternating Current>Objective Problems [ Level 1 ]>Q 51

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The impedance of a circuit consists of $3 Ω$ resistance and $4 Ω$ reactance. The power factor of the circuit is,

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Important Questions on Alternating Current

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 6 - Alternating Current>Objective Problems [ Level 1 ]>Q 52

In an AC circuit,

V_{0}, I_{0}

and

\cos θ

are voltage amplitude, current amplitude and power factor, respectively. The power consumption is,

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 6 - Alternating Current>Objective Problems [ Level 1 ]>Q 53

Power factor is one for,

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 6 - Alternating Current>Objective Problems [ Level 1 ]>Q 54

A direct current of

2 A

and an alternating current having a maximum value of

2 A

flow through two identical resistances. The ratio of heat produced in the two resistances will be,

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 6 - Alternating Current>Objective Problems [ Level 1 ]>Q 55

The power factor of a circuit is,

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 6 - Alternating Current>Objective Problems [ Level 1 ]>Q 56

The process by which AC is converted into DC is known as,

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 6 - Alternating Current>Objective Problems [ Level 1 ]>Q 57

A choke coil has,

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 6 - Alternating Current>Objective Problems [ Level 1 ]>Q 58

L, C

and

R

denote inductance, capacitance and resistance, respectively. Pick out the combination which does not have the dimensions of frequency.

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 6 - Alternating Current>Objective Problems [ Level 1 ]>Q 59

For the series $L C R$ circuit shown in the figure, what is the resonance frequency and the current at the resonating frequency?

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