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 magnitude of alternative voltage V:

Question # 2

Transmitting antenna emits

Question # 3

Which one of the following waves belongs to electromagnetic spectrum

Question # 4

Chock consumes externally small

Question # 5

Electromagnetic waves transmit energy equal to

Question # 6

A resonance curve for RLC series circuit is a plot of frequency versus

Question # 7

The R1= infinity and R2= 0, then the gain of non-inverting amplifier is

Question # 8

The r.m.s. value of alternating current is equal to its maximum value at angle of

Question # 9

If we connect a A.C. volt meter to read A.C. voltage, It would read its:

Question # 10

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

Question # 11

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 # 12

When the emitter-base junction of a transistor is reverse biased, collector current

Question # 13

A diode characteristic curve is a plot between

Question # 14

In which of the following components, pn-junction is used

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 A changing magnetic flux creates around itself
A. An electromotive force
B. An electric field (changing electric flux)
C. Magnetic field
D. None of the above
2 The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its
A. Icwill decrease
B. VCEwill increase
C. ICwill increase
D. VCCwill increase
3 In describing functions of digital systems, a closed switch will be shown as
A. 0
B. 1
C. low
D. any one of these
4 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
5 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
6 The input resistance of the OP-AMP is the resistance between the
A. (-) input and output
B. (+) input and output
C. (-) and (+) inputs
D. between any inputs
7 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
8 A signal is amplified at the output without any change of phase, if it is applied at the
A. inverting input
B. non-inverting input
C. at any of the input
D. none of these
9 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
10 At resonance, the impedance of RLC series circuit is
A. Maximum
B. Zero
C. Minimum
D. Determinate

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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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