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 n-p-n transistor, emitter base junction is kept

Question # 2

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

Question # 3

The bridge circuit of full wave rectification uses

Question # 4

The wave form of alternating voltage is the graph between:

Question # 5

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

Question # 6

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

Question # 7

The sum of positive and negative peak values is called:

Question # 8

Mathematical manipulation of the two quantized states can be best carried if they are represented by

Question # 9

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

Question # 10

Which of the following has a great concentration of impurity

Question # 11

The highest value reached by the voltage or current:

Question # 12

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

Question # 13

The Instantaneous value of alternative current maybe:

Question # 14

The open loop gain of OP-AMP is of the order of

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Chock consumes externally small
A. Charge
B. Current
C. Power
D. Potential
2 The basic circuit element in A.C. circuits are:
A. Resistor and capacitor
B. Resistor and Inductor
C. Capacitor only
D. Both (B) and (C)
3 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
4 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive
5 In an A.C circuit with resistor only, the current and voltage have a phase angle of
A. 90°
B. 0°
C. 180°
D. none of these
6 When either L or C is increased, the resonant frequency of the RLC series circuit
A. Increases
B. Decreases
C. Remains the same
D. Becomes zero
7 When the emitter-base junction of a transistor is reverse biased, collector current
A. Reverses
B. Increases
C. Decreases
D. Stops
8 A resonance curve for RLC series circuit is a plot of frequency versus
A. Voltage
B. Current
C. Impedance
D. Reactance
9 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
10 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal

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