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

Which of the following diode is used for the detection of light

Question # 2

Which one of the following waves belongs to electromagnetic spectrum

Question # 3

The phase angle of a series RLC circuit at resonance is

Question # 4

The Instantaneous value of alternative current maybe:

Question # 5

In half wave rectification

Question # 6

OP-AMP has the following input terminals

Question # 7

The power factor of resonant series circuit is

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

The most common source of alternating voltage is:

Question # 12

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

Question # 13

An A.C varies as a function of

Question # 14

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

Question # 15

Alternating current is produced by a voltage source which polarity:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 Most OP-AMP operates with
A. + 6 V supply
B. + 10 V supply
C. + 12 V supply
D. + 24 V supply
3 The phase angle of a series RLC circuit at resonance is
A. 180°
B. 90°
C. 0°
D. None of the these
4 The time interval during which the Voltage source changes its polarity once is known as:
A. Time period T
B. Half the time period
C. Quarter the time period
D. Two third of the time period
5 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
6 Which of the following diode is used to derive the current in external circuit when light is incident in the circuit
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
7 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
8 In describing functions of digital systems, a closed switch will be shown as
A. 0
B. 1
C. low
D. any one of these
9 If 250V is the RMS value of alternative voltage, then its peak value Vowill be:
A. 353.5V
B. 250V
C. 175V
D. zero
10 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

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