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

Question # 2

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

Question # 3

The wave form of alternating voltage is the graph between:

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

Average value of A.C voltage during one cycle is

Question # 8

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

Question # 9

In a normally biased n-p-n transistor, an electron c current IEflows from the

Question # 10

The total reactance of a series RLC circuit at resonance is

Question # 11

The device which allows only the flow of an A.C. through a circuit is

Question # 12

Chock consumes externally small

Question # 13

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

Question # 14

A changing magnetic flux creates around itself

Question # 15

A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The bridge circuit of full wave rectification uses
A. one diode
B. two diode
C. three diode
D. four diode
2 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
3 Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length
A. X-rays
B. Ultraviolet rays
C. y-rays
D. Cosmic rays
4 Alternating current can be transmitted:
A. To long distance
B. At very high cost
C. At very low cost
D. Both (A) and (C)
5 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three
6 In half wave rectification
A. both halves of the input voltage is used
B. only one half of the input voltage is used
C. either of these
D. none of these
7 Which one of the following is correct?
A. Vo= 1.414 Vrms
B. Iams= 1.414 Io
C. VO = 10.70 Vrms
D. Both a and b
8 For the normal operation of the transistor, its
A. emitter-base and collector base junctions are forward biased
B. emitter-base junction is reversed biased and collector base junction is forward biased
C. emitter-base junction is forward biased and collector-base junction is reverse biased
D. any one of these
9 The value of current gain of n-p-n transistor is of the order of
A. tens
B. hundreds
C. thousands
D. ten thousands
10 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

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  • Iiqra Fatima

    Iiqra Fatima

    25 May 2018

    You should let us practice difficult mcqs ..These are too easy for ECAT level....Thanku

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