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

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

Question # 2

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

Question # 3

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

Question # 4

In which of the following components, pn-junction is used

Question # 5

The value of the potential difference across the depletion region for the case of germanium is

Question # 6

If 250V is the RMS value of alternative voltage, then its peak value Vowill be:

Question # 7

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 # 8

In a normally biased n-p-n transistor, an electron c current IEflows from the

Question # 9

When either L or C is increased, the resonant frequency of the RLC series circuit

Question # 10

Chock consumes externally small

Question # 11

A changing magnetic flux creates around itself

Question # 12

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

Question # 13

SI unit of impedance is

Question # 14

The wave form of alternating voltage is the graph between:

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 A changing magnetic flux creates around itself
A. An electromotive force
B. An electric field (changing electric flux)
C. Magnetic field
D. None of the above
2 For the normal operation of the transistor, its
A. emitter-base and collector base junctions are forward biased
B. emitter-base junction is reversed biased and collector base junction is forward biased
C. emitter-base junction is forward biased and collector-base junction is reverse biased
D. any one of these
3 During the positive half-cycle in the half-wave rectification,the diode
A. does not conduct
B. conducts
C. either of these
D. neither of these
4 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
5 At resonance, the phase angle for RLC series resonance circuit equals
A. 0°
B. 90°
C. 180°
D. 270°
6 Which of the following diodes can operate in the reverse biased condition
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
7 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
8 The input resistance of the OP-AMP is the resistance between the
A. (-) input and output
B. (+) input and output
C. (-) and (+) inputs
D. between any inputs
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 A digital system deals with quantities or variables which have
A. only one state
B. only two discrete states
C. three discrete states
D. four discrete states

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