ECAT Pre Engineering Physics Chapter 16 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Question # 1

The basic circuit element in A.C. circuits are:

Question # 2

Alternating current is produced by a voltage source which polarity:

Question # 3

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

Question # 4

In RLC series circuit, resonance occurs when

Question # 5

A diode characteristic curve is a plot between

Question # 6

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

Question # 7

In series RC circuit when R=Xc, then the phase angle is

Question # 8

The total reactance of a series RLC circuit at resonance is

Question # 9

OP-AMP has the following input terminals

Question # 10

In frequency modulation (FM), the carrier waves amplitude

Question # 11

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

Question # 12

The r.m.s. value of alternating current is equal to its maximum value at angle of

Question # 13

The value of output resistance of OP-AMOP is of the order of

Question # 14

The time interval during which the Voltage source changes its polarity once is known as:

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 When the pn-junction is in reversed biased, current flows through the junction due to the
A. majority carriers
B. minority carriers
C. either of them
D. none of them
2 The time interval during which the Voltage source changes its polarity once is known as:
A. Time period T
B. Half the time period
C. Quarter the time period
D. Two third of the time period
3 The amplifier which us used to perform mathematical operations electronically is known as
A. calculator
B. OP-AMP
C. computer
D. any one of them
4 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
A. base and emitter
B. collector and emitter
C. base and collector
D. any one of these
5 When the pn-junction is forward biased. the current flows through it is of the order of
A. mili-amperes
B. amperes
C. nano-amperes
D. micro-amperes
6 The entire wave form of sinusoidal voltage is actually a set of all the:
A. Positive maximum value + Voand negative maximum value -Vo
B. Posiotive maximum value +Vo and zero
C. Zero and negative maximum value -Vo
D. Any of these
7 In a normally biased n-p-n transistor, an electron c current IEflows from the
A. emitter into the base
B. collector into the base
C. base into collector
D. none of these
8 A resonance curve for RLC series circuit is a plot of frequency versus
A. Voltage
B. Current
C. Impedance
D. Reactance
9 Which one of the following is correct?
A. Vo= 1.414 Vrms
B. Iams= 1.414 Io
C. VO = 10.70 Vrms
D. Both a and b
10 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none of these

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