ECAT Pre Engineering Physics Chapter 16 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Question # 1

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

Question # 2

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

Question # 3

The value of current gain of n-p-n transistor is of the order of

Question # 4

In RLC series circuit, resonance occurs when

Question # 5

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

Question # 6

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

Question # 7

In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.

Question # 8

The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its

Question # 9

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

Question # 10

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

Question # 11

Transmitting antenna emits

Question # 12

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

Question # 13

Which one of the following is correct?

Question # 14

Which of the following has a great concentration of impurity

Question # 15

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The phase at the positive peak of an A.C. cycle is:
A. 0º

B. 90º

C. 180º

D. 0 andᏘ
2 The circuit which is used to smooth the output voltage of the full-wave rectification is known as
A. transformer
B. rectifier
C. filter
D. none of these
3 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
4 Average value of A.C voltage during one cycle is
A. 1
B. Zero
C. Maximum
D. Variable
5 A changing magnetic flux creates around itself
A. An electromotive force
B. An electric field (changing electric flux)
C. Magnetic field
D. None of the above
6 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
7 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
8 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
9 In half wave rectification
A. both halves of the input voltage is used
B. only one half of the input voltage is used
C. either of these
D. none of these
10 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

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