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 output voltage of half wave rectification is in the form of

Question # 2

When the pn-junction is connected reversed biased, its resistance is of the order of

Question # 3

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

Question # 4

The most common source of alternating voltage is:

Question # 5

Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is

Question # 6

The sum of positive and negative peak values is called:

Question # 7

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

Question # 8

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

Question # 9

Which of the following diode is used for the detection of light

Question # 10

For the normal operation of the transistor, its

Question # 11

A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

In describing functions of digital systems, a closed switch will be shown as

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The wave form of alternating voltage is the graph between:
A. Voltage across X-axis and time across y-axis
B. Current and time
C. Voltage along y-axis and time along x-axis
D. Voltage and current
2 An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is
A. 3525.0 volts
B. 35.35 volts
C. 353.5 volts
D. 3.535 volts
3 A sinusoidally alternating voltage or current can be graphically represented by a:
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
4 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
5 Alternating current can be transmitted:
A. To long distance
B. At very high cost
C. At very low cost
D. Both (A) and (C)
6 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
7 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)
8 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
9 When the pn-junction is forward biased. the current flows through it is of the order of
A. mili-amperes
B. amperes
C. nano-amperes
D. micro-amperes
10 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value

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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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