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 value of current gain of n-p-n transistor is of the order of

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tens

hundreds

thousands

ten thousands

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

At resonance frequency the impedance of parallel resonance circuit is

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Maximum

Minimum

Zero

None of the above

A digital system deals with quantities or variables which have

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only one state

only two discrete states

three discrete states

four discrete states

In frequency modulation (FM), the carrier waves amplitude

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Remains constant

Increase

Decreases

None 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)

Alternating current is produced by a voltage source which polarity:

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Remains the same

Reverse after period T

Keeps on reversing with time

Reverse after every time interval T/2

Both (C) and (D)

When the pn-junction is in reversed biased, current flows through the junction due to the

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majority carriers

minority carriers

either of them

none of them

The open loop gain of OP-AMP is of the order of

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10²

10³

10⁴

10⁵

The R₁= infinity and R₂= 0, then the gain of non-inverting amplifier is

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zero

infinity

one

any one of these

The device which allows only the flow of an A.C. through a circuit is

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Capacitor

Inductor

D.C. motor

Battery

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

A signal is amplified at the output without any change of phase, if it is applied at the

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inverting input

non-inverting input

at any of the input

none of these

Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:

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Peak value

RMS value

Instantaneous value

Peak-to-peak value

Both (A) and (C0

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