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

The entire wave form of sinusoidal voltage is actually a set of all the:

Question # 2

The amplifier which us used to perform mathematical operations electronically is known as

Question # 3

The r.m.s. value of alternating current is equal to its maximum value at angle of

Question # 4

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

Question # 5

In half wave rectification

Question # 6

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

Question # 7

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

Question # 8

Which of the following has a great concentration of impurity

Question # 9

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

Question # 10

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

Question # 11

Which one of the following is correct?

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

Which of the following diode is used for the detection of light

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
2 The length of rotating vector (on a certain scale) represents the:
A. Peak value of alternating quantity
B. RMS value of alternating quantity
C. Instantaneous value of alternating quantity
D. Either (B) or (C)
3 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
4 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)
5 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none of these
6 At higher frequency of the alternating current, the capacitive reactance Xc
A. Increases
B. Decreases
C. Remains the same
D. Increases only when the voltage increases
7 When the emitter-base junction of a transistor is reverse biased, collector current
A. Reverses
B. Increases
C. Decreases
D. Stops
8 For the normal operation of the transistor, its
A. emitter-base and collector base junctions are forward biased
B. emitter-base junction is reversed biased and collector base junction is forward biased
C. emitter-base junction is forward biased and collector-base junction is reverse biased
D. any one of these
9 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
10 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms

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