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 Instantaneous value of alternative current maybe:

Question # 2

A changing magnetic flux creates around itself

Question # 3

The sum of positive and negative peak values is called:

Question # 4

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

Question # 5

In RLC series circuit, resonance occurs when

Question # 6

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

Question # 7

A diode characteristic curve is a plot between

Question # 8

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

Question # 9

The r.m.s. value of alternating current is equal to its maximum value at angle of

Question # 10

In which of the following components, pn-junction is used

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

In a transistor, the central region is called

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is
A. 3525.0 volts
B. 35.35 volts
C. 353.5 volts
D. 3.535 volts
2 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)
3 The R1= infinity and R2= 0, then the gain of non-inverting amplifier is
A. zero
B. infinity
C. one
D. any one of these
4 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
5 A digital system deals with quantities or variables which have
A. only one state
B. only two discrete states
C. three discrete states
D. four discrete states
6 The highest value reached by the voltage or current:
A. In quarter cycle is called Instantaneous value
B. In half cycle is called peak-to-peak value
C. In one cycle is called peak value
D. In half cycle is called Instantaneous value
7 The basic circuit element in A.C. circuits are:
A. Resistor and capacitor
B. Resistor and Inductor
C. Capacitor only
D. Both (B) and (C)
8 A resonance curve for RLC series circuit is a plot of frequency versus
A. Voltage
B. Current
C. Impedance
D. Reactance
9 The wave form of alternating voltage is the graph between:
A. Voltage across X-axis and time across y-axis
B. Current and time
C. Voltage along y-axis and time along x-axis
D. Voltage and current
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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