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

For normal operation of transistor, the batteries

Question # 2

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

Question # 3

The value of current gain of n-p-n transistor is of the order of

Question # 4

The impedance of RLC series resonance circuit at resonant frequency is

Question # 5

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

Question # 6

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

Question # 7

Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is

Question # 8

During the negative half-cycle of the half-wave rectification, the diode

Question # 9

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

Question # 10

Alternating current can be transmitted:

Question # 11

The sum of positive and negative peak values is called:

Question # 12

The basic circuit element in A.C. circuits are:

Question # 13

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

Question # 14

In half wave rectification

Question # 15

The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Which one of the following waves belongs to electromagnetic spectrum
A. Radio and TV waves
B. Radar waves
C. Micro waves
D. All of them
2 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
3 The value of the input resistance of OP-AMP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several maga ohms
4 Peak value of alternative current is:
A. one of its Instantaneous value
B. Equal to its RMS value
C. The same as its peak-to-peak value
D. Both (B) and (C)
5 For a n-p-n transistor, the conventional current equation can be written as
A. IE+ IC= IB
B. IC- IB= IE
C. IC+ IB= IE
D. IB+ IE= IC
6 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
7 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)
8 In a transistor, if the central region is n-type, then this type of transistor is known as
A. n-p-n transistor
B. p-n-p transistor
C. either of these
D. none of these
9 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
10 The value of output resistance of OP-AMOP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several mega ohms

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