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 for the detection of light

Question # 2

Conversion of alternating current into direct current is called

Question # 3

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

Question # 4

A diode characteristic curve is a plot between

Question # 5

In frequency modulation (FM), the carrier waves amplitude

Question # 6

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

Question # 7

At higher frequency of the alternating current, the capacitive reactance Xc

Question # 8

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

Question # 9

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

Question # 10

In RLC series circuit, resonance occurs when

Question # 11

When the p-n junction is forward biased its resistance is of the order of

Question # 12

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

Question # 13

For the normal operation of the transistor, its

Question # 14

Which of the following diodes can operate in the reverse biased condition

Question # 15

The average of A.C. current and voltage over a complete cycle is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 When the pn-junction is connected reversed biased, its resistance is of the order of
A. few ohms
B. few kilo-ohms
C. few mega-ohms
D. few mili-ohms
2 The closed loop gain of the inverting amplifier is written as
A. G = R2/R1
B. G = 1 + R2/R1
C. G = -R2/R1
D. G = 1 - R2/R1
3 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
4 The phase angle of a series RLC circuit at resonance is
A. 180°
B. 90°
C. 0°
D. None of the these
5 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)
6 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
7 Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length
A. X-rays
B. Ultraviolet rays
C. y-rays
D. Cosmic rays
8 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
9 The highest value reached by the voltage or current:
A. In quarter cycle is called Instantaneous value
B. In half cycle is called peak-to-peak value
C. In one cycle is called peak value
D. In half cycle is called Instantaneous value
10 If the value of C in a series RLC circuit is increased, the resonant frequency
A. Is not affected
B. Increase
C. Remains the same
D. Decreases

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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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