Question # 1

Power dissipation is a pure inductive or in a pure capacitance circuit is:

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10⁶

0

10^∘

Maximum

The peak to peak value of alternating voltage is

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2V_o

V_o

None of these

Resistance of choke is

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zero

Large

Very small

Infinite

In three phase A.C supply coils are inclined at an angle of.

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0^o

90^o

120^o

80^o

A resistance frequency the impedance of RLC parallel circuit is.

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Zero

Infinite

Maximum

Minimum

At high frequency, the current through a capacitor is

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Small

Infinity

Zero

Large

The unit of impedance is.

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Henry

Hertz

Ampere

Ohm

An A.C. voltmeter reads 220 V, its peak value will be

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225 V

240 V

311.12 V

300 V

An inductor of 1 henry inductance has a reactance 500 ohms, then the frequency required is approximately

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50 Hz

100 Hz

80 Hz

120 Hz

The expression P = VI hold only when current and voltage are.

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In phase

Out of phase

At right angle to each other

At angle of 120 ^o

An in cudutor may store energy in

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Its magnetic field

Its coil

Its electric field

A neighboring circuit

In modulation, low frequency signal is known as

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Carrier wave

fluctuated signal

Modulated carrier signal

Modulation signal

Direct current can not flow through.

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Inductor

Resistor

Transistor

Capacitor

The highest value reached by the voltage or current in one cycle is called.

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Peak ot peak value

Peak value

Instantaneous value

Root mean square value

The phase difference between the current and voltage at resonce is:

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0

π

-π

π/2

The Basic circuit element in a D.C. circuits which controls the current and voltage is

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Resistor

Inductor

Capisitor

Transistor

Electron vibrating 94,000 times each second will produce radio waves of frequency.

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94 Hz

940 HZ

94 Hz

490 Hz

The unit of impedance is

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Farad

Henry

Tesla

Ohm

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