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 bridge circuit of full wave rectification uses

Question # 2

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 # 3

Which one of the following is correct?

Question # 4

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

Question # 5

To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance

Question # 6

The magnitude of alternative voltage V:

Question # 7

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

Question # 8

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

Question # 9

In an A.C circuit with resistor only, the current and voltage have a phase angle of

Question # 10

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

Question # 11

A digital system deals with quantities or variables which have

Question # 12

The waveform of alternating voltage is a:

Question # 13

A changing magnetic flux creates around itself

Question # 14

When the pn-junction is connected reversed biased, its resistance is of the order of

Question # 15

When the pn-junction is forward biased. the current flows through it is of the order of

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The wave form of alternating voltage is the graph between:
A. Voltage across X-axis and time across y-axis
B. Current and time
C. Voltage along y-axis and time along x-axis
D. Voltage and current
2 The Instantaneous value of alternative current maybe:
A. The same as its RMS value
B. Greater than its Rms value
C. The same as its peak value
D. Any of these
3 Mathematical manipulation of the two quantized states can be best carried if they are represented by
A. high - low
B. yes - no
C. on - off
D. 0 - 1
4 The most common source of alternating voltage is:
A. Motor
B. Transformer
C. AC genrator
D. Both (A) and (C)
5 If the value of C in a series RLC circuit is increased, the resonant frequency
A. Is not affected
B. Increase
C. Remains the same
D. Decreases
6 The highest value reached by the voltage or current:
A. In quarter cycle is called Instantaneous value
B. In half cycle is called peak-to-peak value
C. In one cycle is called peak value
D. In half cycle is called Instantaneous value
7 In a transistor, if the central region is p-type then this type of transistor is known as
A. p-n-p transistor
B. n-p-n transistor
C. either of these
D. none of these
8 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none of these
9 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
10 In series RC circuit when R=Xc, then the phase angle is
A. 0°
B. 90°
C. 70°
D. 45°

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