ECAT Pre Engineering Physics Chapter 16 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Question # 1

The circuit which is used to smooth the output voltage of the full-wave rectification is known as

Question # 2

Alternating current is produced by a voltage source which polarity:

Question # 3

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

Question # 4

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

Question # 5

An A.C varies as a function of

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

Conversion of alternating current into direct current is called

Question # 10

Nowadays, Most of the electric energy is produced by the A.C. generators using:

Question # 11

OP-AMP has the following input terminals

Question # 12

The closed loop gain of the inverting amplifier is written as

Question # 13

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

Question # 14

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

Question # 15

A P-N juction or semiconductor diode cannot be used as

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive
2 Conversion of alternating current into direct current is called
A. amplification
B. rectification
C. conduction
D. polarization
3 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
4 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)
5 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
6 A P-N juction or semiconductor diode cannot be used as
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
7 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
8 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
9 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none of these
10 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

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