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

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

Question # 2

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

Question # 3

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

Question # 4

A changing magnetic flux creates around itself

Question # 5

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

Question # 6

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

Question # 7

The sum of positive and negative peak values is called:

Question # 8

The output voltage of half wave rectification is in the form of

Question # 9

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

Question # 10

In free space, the speed of electromagnetic waves is

Question # 11

For a n-p-n transistor, the conventional current equation can be written as

Question # 12

A P-N juction or semiconductor diode cannot be used as

Question # 13

The device which allows only the flow of an A.C. through a circuit is

Question # 14

A digital system deals with quantities or variables which have

Question # 15

An A.C varies as a function of

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The closed loop gain of the non-inverting amplifier is given by
A. G = R2/R1
B. G = -R2/R1
C. G = 1 - R2/R1
D. G = 1 + T2/R1
2 Which one of the following is correct?
A. Vo= 1.414 Vrms
B. Iams= 1.414 Io
C. VO = 10.70 Vrms
D. Both a and b
3 The value of current gain of n-p-n transistor is of the order of
A. tens
B. hundreds
C. thousands
D. ten thousands
4 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
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 Which of the following diode is used for the detection of light
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them
7 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive
8 The time interval during which the Voltage source changes its polarity once is known as:
A. Time period T
B. Half the time period
C. Quarter the time period
D. Two third of the time period
9 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°
10 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

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