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

In half wave rectification

Question # 3

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

Question # 4

An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current

Question # 5

The RMS value of alternating current is:

Question # 6

In a transistor, if the central region is p-type then this type of transistor is known as

Question # 7

The magnitude of alternative voltage V:

Question # 8

In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.

Question # 9

In a normally biased n-p-n transistor, an electron c current IEflows from the

Question # 10

Chock consumes externally small

Question # 11

OP-AMP has the following input terminals

Question # 12

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

Question # 13

Which one of the following is correct?

Question # 14

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

Question # 15

The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The most common source of alternating voltage is:
A. Motor
B. Transformer
C. AC genrator
D. Both (A) and (C)
2 In which of the following components, pn-junction is used
A. light emitting diode
B. photo diode
C. photo voltaic cell
D. all of these
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 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
5 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
6 Alternating current is produced by a voltage source which polarity:
A. Remains the same
B. Reverse after period T
C. Keeps on reversing with time
D. Reverse after every time interval T/2
7 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
8 Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is
A. zero
B. small
C. large
D. very large
9 During the positive half-cycle in the half-wave rectification,the diode
A. does not conduct
B. conducts
C. either of these
D. neither of these
10 The impedance of RLC series resonance circuit at resonant frequency is
A. Greater than R
B. Equal to R
C. Less than R
D. None of these

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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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