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 closed loop gain of the inverting amplifier is written as

Question # 2

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

Question # 3

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

Question # 4

At higher frequency of the alternating current, the capacitive reactance Xc

Question # 5

If we connect a A.C. volt meter to read A.C. voltage, It would read its:

Question # 6

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

Question # 7

Average value of A.C voltage during one cycle is

Question # 8

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

Question # 9

Which of the following diodes can operate in the reverse biased condition

Question # 10

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

Question # 11

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

Question # 12

When the pn-junction is in reversed biased, current flows through the junction due to the

Question # 13

During the negative half-cycle of the half-wave rectification, the diode

Question # 14

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

Question # 15

A diode characteristic curve is a plot between

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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 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
3 To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance
A. 5.07 pF
B. 50 pF
C. 0.507 pF
D. 507 pF
4 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
5 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
6 During the positive half-cycle in the half-wave rectification,the diode
A. does not conduct
B. conducts
C. either of these
D. neither of these
7 A P-N juction or semiconductor diode cannot be used as
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
8 In which of the following components, pn-junction is used
A. light emitting diode
B. photo diode
C. photo voltaic cell
D. all of these
9 In frequency modulation (FM), the carrier waves amplitude
A. Remains constant
B. Increase
C. Decreases
D. None of these
10 Conversion of alternating current into direct current is called
A. amplification
B. rectification
C. conduction
D. polarization

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