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

The wave form of alternating voltage is the graph between:

Question # 2

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

Question # 3

Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length

Question # 4

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

Question # 5

In free space, the speed of electromagnetic waves is

Question # 6

In a transistor, the central region is called

Question # 7

The magnitude of alternative voltage V:

Question # 8

Transmitting antenna emits

Question # 9

The impedance of RLC series resonance circuit at resonant frequency is

Question # 10

Alternating current is produced by a voltage source which polarity:

Question # 11

The basic circuit element in D.C. circuit is:

Question # 12

The phase at the positive peak of an A.C. cycle is:

Question # 13

At resonance frequency the impedance of parallel resonance circuit is

Question # 14

When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency

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 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
2 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
3 The basic circuit element in A.C. circuits are:
A. Resistor and capacitor
B. Resistor and Inductor
C. Capacitor only
D. Both (B) and (C)
4 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
5 Alternating current is produced by a voltage source which polarity:
A. Remains the same
B. Reverse after period T
C. Keeps on reversing with time
D. Reverse after every time interval T/2
6 In a transistor, if the central region is n-type, then this type of transistor is known as
A. n-p-n transistor
B. p-n-p transistor
C. either of these
D. none of these
7 Most OP-AMP operates with
A. + 6 V supply
B. + 10 V supply
C. + 12 V supply
D. + 24 V supply
8 The RMS value of alternating current is:
A. 0.7 times at the peak value
B. 0.5 times the peak value
C. 0.7 times the Instantaneous value
D. Equal to maximum voltage
9 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
10 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5

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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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