Question # 1

During the positive half-cycle in the half-wave rectification,the diode

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does not conduct

conducts

either of these

neither of these

The length of rotating vector (on a certain scale) represents the:

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Peak value of alternating quantity

RMS value of alternating quantity

Instantaneous value of alternating quantity

Either (B) or (C)

Either (A) or (B)

The average of A.C. current and voltage over a complete cycle is

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Maximum

zero

Neither zero nor maximum

None of these

For normal operation of transistor, the batteries

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V_CCis of much lower value than V_BB

V_CCis of much higher value than V_BB

V_{CC is equal to}V_BB

none of these

In n-p-n transistor, emitter base junction is kept

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reversed

forward biased

may be reversed or may be forward biased

none of these

When the pn-junction is forward biased. the current flows through it is of the order of

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mili-amperes

amperes

nano-amperes

micro-amperes

The wave form of alternating voltage is the graph between:

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Voltage across X-axis and time across y-axis

Current and time

Voltage along y-axis and time along x-axis

Voltage and current

Either (B) or (D)

When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency

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9.4 kHz

940 kHz

94 kHz

None of these

At resonance frequency the impedance of parallel resonance circuit is

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Maximum

Minimum

Zero

None of the above

At resonance, the phase angle for RLC series resonance circuit equals

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0°

90°

180°

270°

During the negative half-cycle of the half-wave rectification, the diode

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does not conduct

conducts

either of these

none of these

The Instantaneous value of alternative current maybe:

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The same as its RMS value

Greater than its Rms value

The same as its peak value

Any of these

None of these

Which of the following has a great concentration of impurity

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base

emitter

collector

none of these

During each cycle, alternating voltage reaches a peak value

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One time

Two times

Four times

A number of times depending on the frequency

The bridge circuit of full wave rectification uses

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one diode

two diode

three diode

four diode

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ECAT Physics Chapter 16 Alternating Current Online Test MCQs With Answers

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