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

Alternating current can be transmitted:

Question # 2

Which one of the following is correct?

Question # 3

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

Question # 4

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

Question # 5

The phase angle of a series RLC circuit at resonance is

Question # 6

An A.C varies as a function of

Question # 7

Alternating current can induce voltage because it has a

Question # 8

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

Question # 9

Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:

Question # 10

Alternating current is produced by a voltage source which polarity:

Question # 11

If 250V is the RMS value of alternative voltage, then its peak value Vowill be:

Question # 12

In series RC circuit when R=Xc, then the phase angle is

Question # 13

At resonance frequency the impedance of parallel resonance circuit is

Question # 14

Transmitting antenna emits

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 At resonance, the impedance of RLC series circuit is
A. Maximum
B. Zero
C. Minimum
D. Determinate
3 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
4 A sinusoidally alternating voltage or current can be graphically represented by a:
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
5 In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them
6 The length of rotating vector (on a certain scale) represents the:
A. Peak value of alternating quantity
B. RMS value of alternating quantity
C. Instantaneous value of alternating quantity
D. Either (B) or (C)
7 In describing functions of digital systems, a closed switch will be shown as
A. 0
B. 1
C. low
D. any one of these
8 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
9 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant
10 When the pn-junction is forward biased. the current flows through it is of the order of
A. mili-amperes
B. amperes
C. nano-amperes
D. micro-amperes

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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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