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 power factor of resonant series circuit is

Question # 2

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

Question # 3

The circuit which is used to smooth the output voltage of the full-wave rectification is known as

Question # 4

When the p-n junction is forward biased its resistance is of the order of

Question # 5

The alternative voltage of current is actually measured by:

Question # 6

The basic circuit element in D.C. circuit is:

Question # 7

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

Question # 8

For normal operation of transistor, the batteries

Question # 9

When the pn-junction is in reversed biased, current flows through the junction due to the

Question # 10

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

Question # 11

Most OP-AMP operates with

Question # 12

Chock consumes externally small

Question # 13

Alternating current can induce voltage because it has a

Question # 14

For the normal operation of the transistor, its

Question # 15

A resonance curve for RLC series circuit is a plot of frequency versus

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant
2 At resonance, the phase angle for RLC series resonance circuit equals
A. 0°
B. 90°
C. 180°
D. 270°
3 Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:
A. Peak value
B. RMS value
C. Instantaneous value
D. Peak-to-peak value
4 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
5 For normal operation of transistor, the batteries
A. VCCis of much lower value than VBB
B. VCCis of much higher value than VBB
C. VCC is equal toVBB
D. none of these
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 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
8 The output voltage of half wave rectification is in the form of
A. a smooth curve
B. a smooth wave
C. pulses
D. all of the above
9 The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its
A. Icwill decrease
B. VCEwill increase
C. ICwill increase
D. VCCwill increase
10 The RMS value of alternating current is:
A. 0.7 times at the peak value
B. 0.5 times the peak value
C. 0.7 times the Instantaneous value
D. Equal to maximum voltage

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