Question # 1

The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its

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I_cwill decrease

V_CEwill increase

I_Cwill increase

V_CCwill increase

The sum of positive and negative peak values is called:

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Instantaneous value

Peak value

Rms valuie

Peak-to peak-value

None of these

The bridge circuit of full wave rectification uses

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one diode

two diode

three diode

four diode

Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length

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X-rays

Ultraviolet rays

y-rays

Cosmic rays

When a transistor is used as a switch the circuit in which the current is to be switched OFF and ON, is connected between the

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base and emitter

collector and emitter

base and collector

any one of these

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)

Mathematical manipulation of the two quantized states can be best carried if they are represented by

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high - low

yes - no

on - off

0 - 1

Which one of the following is correct?

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V_o= 1.414 V_rms

I_ams= 1.414 I_o

VO = 10.70 Vrms

Both a and b

Chock consumes externally small

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Charge

Current

Power

Potential

The closed loop gain of the non-inverting amplifier is given by

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G = R₂/R₁

G = -R₂/R₁

G = 1 - R₂/R₁

G = 1 + T₂/R₁

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

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10²

10³

10⁴

10⁵

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

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tens

hundreds

thousands

ten thousands

Alternating current can be transmitted:

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To long distance

At very high cost

At very low cost

Both (A) and (C)

Both (A) and (B)

A P-N juction or semiconductor diode cannot be used as

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A rectifier

Detector

Oscillator

An amplifier

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

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

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