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 sum of positive and negative peak values is called:

Question # 2

The value of the potential difference across the depletion region for the case of germanium is

Question # 3

Most OP-AMP operates with

Question # 4

Electromagnetic waves transmit energy equal to

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

When the pn-junction is in reversed biased, current flows through the junction due to the

Question # 9

For normal operation of transistor, the batteries

Question # 10

Chock consumes externally small

Question # 11

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

Question # 12

Nowadays, Most of the electric energy is produced by the A.C. generators using:

Question # 13

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

Question # 14

In free space, the speed of electromagnetic waves is

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none of these
2 The impedance of RLC series resonance circuit at resonant frequency is
A. Greater than R
B. Equal to R
C. Less than R
D. None of these
3 An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current
A. Decreases
B. Increases
C. Does not change
D. Momentarily goes to zero
4 The value of the input resistance of OP-AMP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several maga ohms
5 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
6 Most OP-AMP operates with
A. + 6 V supply
B. + 10 V supply
C. + 12 V supply
D. + 24 V supply
7 The value of output resistance of OP-AMOP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several mega ohms
8 The r.m.s. value of alternating current is equal to its maximum value at angle of
A. 60°
B. 45°
C. 30°
D. 90°
9 Peak value of alternative current is:
A. one of its Instantaneous value
B. Equal to its RMS value
C. The same as its peak-to-peak value
D. Both (B) and (C)
10 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

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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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