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

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

Question # 2

A diode characteristic curve is a plot between

Question # 3

At resonance, the impedance of RLC series circuit is

Question # 4

For normal operation of transistor, the batteries

Question # 5

The magnitude of alternative voltage V:

Question # 6

In frequency modulation (FM), the carrier waves amplitude

Question # 7

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

Question # 8

During the positive half-cycle in the half-wave rectification,the diode

Question # 9

In RLC series circuit, resonance occurs when

Question # 10

Average value of A.C voltage during one cycle is

Question # 11

A digital system deals with quantities or variables which have

Question # 12

An A.C varies as a function of

Question # 13

Peak value of alternative current is:

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The value of current gain of n-p-n transistor is of the order of
A. tens
B. hundreds
C. thousands
D. ten thousands
2 In an A.C circuit with resistor only, the current and voltage have a phase angle of
A. 90°
B. 0°
C. 180°
D. none of these
3 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
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 Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is
A. zero
B. small
C. large
D. very large
6 In a transistor, if the central region is p-type then this type of transistor is known as
A. p-n-p transistor
B. n-p-n transistor
C. either of these
D. none of these
7 Conversion of alternating current into direct current is called
A. amplification
B. rectification
C. conduction
D. polarization
8 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)
9 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
10 When the pn-junction is in reversed biased, current flows through the junction due to the
A. majority carriers
B. minority carriers
C. either of them
D. none of them

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