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

At resonance, the phase angle for RLC series resonance circuit equals

Question # 2

Transmitting antenna emits

Question # 3

During each cycle, alternating voltage reaches a peak value

Question # 4

At higher frequency of the alternating current, the capacitive reactance Xc

Question # 5

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

Question # 6

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

Question # 7

In frequency modulation (FM), the carrier waves amplitude

Question # 8

The value of output resistance of OP-AMOP is of the order of

Question # 9

At resonance, the impedance of RLC series circuit is

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

In n-p-n transistor, emitter base junction is kept

Question # 14

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

Question # 15

The length of rotating vector (on a certain scale) represents the:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The phase angle of a series RLC circuit at resonance is
A. 180°
B. 90°
C. 0°
D. None of the these
2 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
3 To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance
A. 5.07 pF
B. 50 pF
C. 0.507 pF
D. 507 pF
4 When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency
A. 9.4 kHz
B. 940 kHz
C. 94 kHz
D. None of these
5 Alternating current can induce voltage because it has a
A. High peak value
B. Varying magnetic field
C. Stronger field than direct curren
D. Constant magnetic field
6 The average of A.C. current and voltage over a complete cycle is
A. Maximum
B. zero
C. Neither zero nor maximum
D. None of these
7 The Instantaneous value of alternative current maybe:
A. The same as its RMS value
B. Greater than its Rms value
C. The same as its peak value
D. Any of these
8 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
9 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)
10 The output voltage of half wave rectification is in the form of
A. a smooth curve
B. a smooth wave
C. pulses
D. all of the above

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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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