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

A diode characteristic curve is a plot between

Question # 2

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

Question # 3

Conversion of alternating current into direct current is called

Question # 4

The output voltage of half wave rectification is in the form of

Question # 5

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

Question # 6

The total reactance of a series RLC circuit at resonance is

Question # 7

Alternating current can induce voltage because it has a

Question # 8

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

Question # 9

The magnitude of alternative voltage V:

Question # 10

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

Question # 11

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

Question # 12

Which of the following diodes can operate in the reverse biased condition

Question # 13

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

Question # 14

The input resistance of the OP-AMP is the resistance between the

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 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
2 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
3 Average value of A.C voltage during one cycle is
A. 1
B. Zero
C. Maximum
D. Variable
4 During the positive half-cycle in the half-wave rectification,the diode
A. does not conduct
B. conducts
C. either of these
D. neither of these
5 When the emitter-base junction of a transistor is reverse biased, collector current
A. Reverses
B. Increases
C. Decreases
D. Stops
6 When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency
A. 9.4 kHz
B. 940 kHz
C. 94 kHz
D. None of these
7 The average of A.C. current and voltage over a complete cycle is
A. Maximum
B. zero
C. Neither zero nor maximum
D. None of these
8 The most common source of alternating voltage is:
A. Motor
B. Transformer
C. AC genrator
D. Both (A) and (C)
9 A diode characteristic curve is a plot between
A. current and time
B. voltage and time
C. voltage and current
D. forward voltage and reversed voltage
10 When a transistor is used as a switch the circuit in which the current is to be switched OFF and ON, is connected between the
A. base and emitter
B. collector and emitter
C. base and collector
D. any one of these

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