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

Question # 2

Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length

Question # 3

At resonance frequency the impedance of parallel resonance circuit is

Question # 4

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

Question # 5

The RMS value of alternating current is:

Question # 6

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

Question # 7

An A.C varies as a function of

Question # 8

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

Question # 9

The phase angle of a series RLC circuit at resonance is

Question # 10

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

Question # 11

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

Question # 12

Electromagnetic waves transmit energy equal to

Question # 13

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

Question # 14

In an A.C circuit with resistor only, the current and voltage have a phase angle of

Question # 15

In free space, the speed of electromagnetic waves is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The device which allows only the flow of an A.C. through a circuit is
A. Capacitor
B. Inductor
C. D.C. motor
D. Battery
2 If 250V is the RMS value of alternative voltage, then its peak value Vowill be:
A. 353.5V
B. 250V
C. 175V
D. zero
3 Conversion of alternating current into direct current is called
A. amplification
B. rectification
C. conduction
D. polarization
4 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
5 If we connect a A.C. volt meter to read A.C. voltage, It would read its:
A. RMS value
B. Instantaneous value
C. Valued average over a cycle
D. Zero
6 The phase at the positive peak of an A.C. cycle is:
A. 0º

B. 90º

C. 180º

D. 0 andᏘ
7 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
8 The amplifier which us used to perform mathematical operations electronically is known as
A. calculator
B. OP-AMP
C. computer
D. any one of them
9 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
10 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge

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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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