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

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

Question # 3

In frequency modulation (FM), the carrier waves amplitude

Question # 4

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

Question # 5

The waveform of alternating voltage is a:

Question # 6

The closed loop gain of the non-inverting amplifier is given by

Question # 7

An A.C varies as a function of

Question # 8

In describing functions of digital systems, a closed switch will be shown as

Question # 9

When either L or C is increased, the resonant frequency of the RLC series circuit

Question # 10

The RMS value of alternating current is:

Question # 11

In half wave rectification

Question # 12

The average of A.C. current and voltage over a complete cycle is

Question # 13

The value of the potential difference across the depletion region for the case of germanium is

Question # 14

The closed loop gain of the inverting amplifier is written as

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 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)
3 The Instantaneous value of alternative current maybe:
A. The same as its RMS value
B. Greater than its Rms value
C. The same as its peak value
D. Any of these
4 A p-n junction is formed when a crystal of silicon is growth in such a way that its one half is doped with trivalent impurity and the other half with a impurity from
A. 2nd group
B. fourth group
C. fifth group
D. sixth group
5 Average value of A.C voltage during one cycle is
A. 1
B. Zero
C. Maximum
D. Variable
6 When the emitter-base junction of a transistor is reverse biased, collector current
A. Reverses
B. Increases
C. Decreases
D. Stops
7 If 250V is the RMS value of alternative voltage, then its peak value Vowill be:
A. 353.5V
B. 250V
C. 175V
D. zero
8 When a transistor is used as a switch the circuit in which the current is to be switched OFF and ON, is connected between the
A. base and emitter
B. collector and emitter
C. base and collector
D. any one of these
9 In frequency modulation (FM), the carrier waves amplitude
A. Remains constant
B. Increase
C. Decreases
D. None of these
10 The length of rotating vector (on a certain scale) represents the:
A. Peak value of alternating quantity
B. RMS value of alternating quantity
C. Instantaneous value of alternating quantity
D. Either (B) or (C)

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