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

SI unit of impedance is

Question # 3

To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance

Question # 4

Transmitting antenna emits

Question # 5

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

Question # 6

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

Question # 7

The total reactance of a series RLC circuit at resonance is

Question # 8

In a transistor, if the central region is n-type, then this type of transistor is known as

Question # 9

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 # 10

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

Question # 11

Alternating current can be transmitted:

Question # 12

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

Question # 13

The R1= infinity and R2= 0, then the gain of non-inverting amplifier is

Question # 14

The RMS value of alternating current is:

Question # 15

Chock consumes externally small

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 During each cycle, alternating voltage reaches a peak value
A. One time
B. Two times
C. Four times
D. A number of times depending on the frequency
3 In a transistor, if the central region is p-type then this type of transistor is known as
A. p-n-p transistor
B. n-p-n transistor
C. either of these
D. none of these
4 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three
5 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
6 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
7 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
8 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
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 The device which allows only the flow of an A.C. through a circuit is
A. Capacitor
B. Inductor
C. D.C. motor
D. Battery

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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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