ECAT Pre Computer Science Chapter 16 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 16 Alternating Current

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

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ECAT Physics Chapter 16 Alternating Current

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Question # 1

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

Question # 2

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

Question # 3

The wave form of alternating voltage is the graph between:

Question # 4

Peak value of alternative current is:

Question # 5

SI unit of impedance is

Question # 6

The sum of positive and negative peak values is called:

Question # 7

A resonance curve for RLC series circuit is a plot of frequency versus

Question # 8

Most OP-AMP operates with

Question # 9

For normal operation of transistor, the batteries

Question # 10

Which of the following has a great concentration of impurity

Question # 11

Alternating current can be transmitted:

Question # 12

A changing magnetic flux creates around itself

Question # 13

If the value of C in a series RLC circuit is increased, the resonant frequency

Question # 14

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

Question # 15

The basic circuit elements of A.C circuit are

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 At resonance, the impedance of RLC series circuit is
A. Maximum
B. Zero
C. Minimum
D. Determinate
3 The R1= infinity and R2= 0, then the gain of non-inverting amplifier is
A. zero
B. infinity
C. one
D. any one of these
4 A P-N juction or semiconductor diode cannot be used as
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
5 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
6 Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length
A. X-rays
B. Ultraviolet rays
C. y-rays
D. Cosmic rays
7 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive
8 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
9 Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:
A. Peak value
B. RMS value
C. Instantaneous value
D. Peak-to-peak value
10 The length of rotating vector (on a certain scale) represents the:
A. Peak value of alternating quantity
B. RMS value of alternating quantity
C. Instantaneous value of alternating quantity
D. Either (B) or (C)

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