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

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

Question # 2

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

Question # 3

For normal operation of transistor, the batteries

Question # 4

If 250V is the RMS value of alternative voltage, then its peak value Vowill be:

Question # 5

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

Question # 6

Which one of the following is correct?

Question # 7

OP-AMP has the following input terminals

Question # 8

The alternative voltage of current is actually measured by:

Question # 9

Which of the following has a great concentration of impurity

Question # 10

When either L or C is increased, the resonant frequency of the RLC series circuit

Question # 11

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

Question # 12

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

Question # 13

In a transistor, the central region is called

Question # 14

The length of rotating vector (on a certain scale) represents the:

Question # 15

A resonance curve for RLC series circuit is a plot of frequency versus

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 The output voltage of half wave rectification is in the form of
A. a smooth curve
B. a smooth wave
C. pulses
D. all of the above
3 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
4 At resonance, the impedance of RLC series circuit is
A. Maximum
B. Zero
C. Minimum
D. Determinate
5 The value of the potential difference across the depletion region for the case of germanium is
A. 0.3 V
B. 0.5 V
C. 0.7 V
D. 0.9 V
6 If 250V is the RMS value of alternative voltage, then its peak value Vowill be:
A. 353.5V
B. 250V
C. 175V
D. zero
7 The phase at the positive peak of an A.C. cycle is:
A. 0º

B. 90º

C. 180º

D. 0 andᏘ
8 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
9 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
10 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive

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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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