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

SI unit of impedance is

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

At resonance, the phase angle for RLC series resonance circuit equals

Question # 6

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

Question # 7

A p-n junction is formed when a crystal of silicon is growth in such a way that its one half is doped with trivalent impurity and the other half with a impurity from

Question # 8

A changing magnetic flux creates around itself

Question # 9

In series RC circuit when R=Xc, then the phase angle is

Question # 10

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

Question # 11

An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current

Question # 12

The phase at the positive peak of an A.C. cycle is:

Question # 13

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

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The R1= infinity and R2= 0, then the gain of non-inverting amplifier is
A. zero
B. infinity
C. one
D. any one of these
2 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none of these
3 The most common source of alternating voltage is:
A. Motor
B. Transformer
C. AC genrator
D. Both (A) and (C)
4 Which of the following diodes can operate in the reverse biased condition
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
5 A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at
A. inverting input
B. non-inverting input
C. any one of the input terminal
D. none of them
6 During each cycle, alternating voltage reaches a peak value
A. One time
B. Two times
C. Four times
D. A number of times depending on the frequency
7 At resonance, the phase angle for RLC series resonance circuit equals
A. 0°
B. 90°
C. 180°
D. 270°
8 The value of the potential difference across the depletion region for the case of germanium is
A. 0.3 V
B. 0.5 V
C. 0.7 V
D. 0.9 V
9 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
10 A digital system deals with quantities or variables which have
A. only one state
B. only two discrete states
C. three discrete states
D. four discrete states

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