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 is amplified at the output without any change of phase, if it is applied at the

Question # 2

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

Question # 3

A p-n junction is formed when a crystal of silicon is growth in such a way that its one half is doped with trivalent impurity and the other half with a impurity from

Question # 4

The bridge circuit of full wave rectification uses

Question # 5

For a n-p-n transistor, the conventional current equation can be written as

Question # 6

Conversion of alternating current into direct current is called

Question # 7

The output voltage of half wave rectification is in the form of

Question # 8

The waveform of alternating voltage is a:

Question # 9

A sinusoidally alternating voltage or current can be graphically represented by a:

Question # 10

At resonance, the impedance of RLC series circuit is

Question # 11

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

Question # 12

When the pn-junction is forward biased. the current flows through it is of the order of

Question # 13

The closed loop gain of the non-inverting amplifier is given by

Question # 14

The RMS value of alternating current is:

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Transmitting antenna emits
A. Magnetic waves
B. Electric waves
C. Electromagnetic waves
D. Sound waves
2 Mathematical manipulation of the two quantized states can be best carried if they are represented by
A. high - low
B. yes - no
C. on - off
D. 0 - 1
3 The RMS value of alternating current is:
A. 0.7 times at the peak value
B. 0.5 times the peak value
C. 0.7 times the Instantaneous value
D. Equal to maximum voltage
4 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
5 The alternative voltage of current is actually measured by:
A. Its RMS value
B. Square root of its mean square value
C. Instantaneous value
D. Peak value
6 Which of the following diodes can operate in the reverse biased condition
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
7 If we connected the ordinary DC ammeter to measure alternating current, it would measure its:
A. Instantaneous value
B. RMS value
C. Value averaged over a cycle
D. Either (B) or (C)
8 At resonance, the phase angle for RLC series resonance circuit equals
A. 0°
B. 90°
C. 180°
D. 270°
9 Most OP-AMP operates with
A. + 6 V supply
B. + 10 V supply
C. + 12 V supply
D. + 24 V supply
10 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

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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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