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

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

Question # 2

An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is

Question # 3

The value of the input resistance of OP-AMP is of the order of

Question # 4

For normal operation of transistor, the batteries

Question # 5

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

Question # 6

During the positive half-cycle in the half-wave rectification,the diode

Question # 7

The amplifier which us used to perform mathematical operations electronically is known as

Question # 8

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 # 9

The wave form of alternating voltage is the graph between:

Question # 10

When the emitter-base junction of a transistor is reverse biased, collector current

Question # 11

The alternative voltage of current is actually measured by:

Question # 12

If we connect a A.C. volt meter to read A.C. voltage, It would read its:

Question # 13

The Instantaneous value of alternative current maybe:

Question # 14

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

Question # 15

The total reactance of a series RLC circuit at resonance is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 The alternative voltage of current is actually measured by:
A. Its RMS value
B. Square root of its mean square value
C. Instantaneous value
D. Peak value
3 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
4 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
5 A resonance curve for RLC series circuit is a plot of frequency versus
A. Voltage
B. Current
C. Impedance
D. Reactance
6 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
7 The Instantaneous value of alternative current maybe:
A. The same as its RMS value
B. Greater than its Rms value
C. The same as its peak value
D. Any of these
8 If we connected the ordinary DC ammeter to measure alternating current, it would measure its:
A. Instantaneous value
B. RMS value
C. Value averaged over a cycle
D. Either (B) or (C)
9 In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them
10 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

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  • Iiqra Fatima

    Iiqra Fatima

    25 May 2018

    You should let us practice difficult mcqs ..These are too easy for ECAT level....Thanku

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