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

During each cycle, alternating voltage reaches a peak value

Question # 2

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

Question # 3

If the value of C in a series RLC circuit is increased, the resonant frequency

Question # 4

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

Question # 5

When the p-n junction is forward biased its resistance is of the order of

Question # 6

At resonance, the impedance of RLC series circuit is

Question # 7

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

Question # 8

OP-AMP has the following input terminals

Question # 9

For the normal operation of the transistor, its

Question # 10

The basic circuit element in A.C. circuits are:

Question # 11

An A.C varies as a function of

Question # 12

Conversion of alternating current into direct current is called

Question # 13

The phase angle of a series RLC circuit at resonance is

Question # 14

In frequency modulation (FM), the carrier waves amplitude

Question # 15

The most common source of alternating voltage is:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
3 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
4 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
5 The most common source of alternating voltage is:
A. Motor
B. Transformer
C. AC genrator
D. Both (A) and (C)
6 At higher frequency of the alternating current, the capacitive reactance Xc
A. Increases
B. Decreases
C. Remains the same
D. Increases only when the voltage increases
7 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
8 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three
9 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
10 During each cycle, alternating voltage reaches a peak value
A. One time
B. Two times
C. Four times
D. A number of times depending on the frequency

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