Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 6 - Alternating Current>Objective Problems [ Level 1 ]>Q 21

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A coil having an inductance of $\frac{1}{π} H$ is connected in series with a resistance of $300 Ω$ . If a $20 V$ and $200 Hz$ source are impressed across the combination, the value of the tangent of the phase angle between the voltage and the current will be:

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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 22

In an AC circuit, a resistance of

R Ω

is connected in series with an inductance

L

. If phase angle between voltage and current is

45 °

, the value of inductive reactance 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 23

In a circuit containing

R

and

L

, as the frequency of the impressed AC increases, the impedance of the circuit,

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 6 - Alternating Current>Objective Problems [ Level 1 ]>Q 24

With increase in frequency of an AC supply, the impedance of an

L C R

series circuit,

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 6 - Alternating Current>Objective Problems [ Level 1 ]>Q 25

Which of the graphs shown below represents the reactance of a series

L C

combination?

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 6 - Alternating Current>Objective Problems [ Level 1 ]>Q 26

An alternating voltage is connected in series with a resistance

R

and an inductance

L

. If the potential drop across the resistance is

200 V

and across the inductance is

150 V

, then the applied voltage is,

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 6 - Alternating Current>Objective Problems [ Level 1 ]>Q 27

An alternating voltage

E = 200 \sqrt{2} \sin (100 t)

is connected to a

1 μ F

capacitor through an

AC

ammeter. The reading of the ammeter shall be

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 6 - Alternating Current>Objective Problems [ Level 1 ]>Q 28

In the circuit shown, the $A C$ Source has voltage $V = 20 \cos (ω t)$ Volt with $ω = 2000 rad s^{- 1},$ The amplitude of the current will be nearest to

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 6 - Alternating Current>Objective Problems [ Level 1 ]>Q 29

The rms voltage of the waveform shown is

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