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

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 # 2

The Instantaneous value of alternative current maybe:

Question # 3

In a transistor, if the central region is p-type then this type of transistor is known as

Question # 4

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

Question # 5

The open loop gain of OP-AMP is of the order of

Question # 6

The phase at the positive peak of an A.C. cycle is:

Question # 7

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

Question # 8

Which of the following has a great concentration of impurity

Question # 9

Most OP-AMP operates with

Question # 10

Transmitting antenna emits

Question # 11

In n-p-n transistor, emitter base junction is kept

Question # 12

The total reactance of a series RLC circuit at resonance is

Question # 13

The closed loop gain of the inverting amplifier is written as

Question # 14

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

Question # 15

The amplifier which us used to perform mathematical operations electronically is known as

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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 The average of A.C. current and voltage over a complete cycle is
A. Maximum
B. zero
C. Neither zero nor maximum
D. None of these
3 The value of current gain of n-p-n transistor is of the order of
A. tens
B. hundreds
C. thousands
D. ten thousands
4 Conversion of alternating current into direct current is called
A. amplification
B. rectification
C. conduction
D. polarization
5 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
6 When the pn-junction is forward biased. the current flows through it is of the order of
A. mili-amperes
B. amperes
C. nano-amperes
D. micro-amperes
7 Which one of the following is correct?
A. Vo= 1.414 Vrms
B. Iams= 1.414 Io
C. VO = 10.70 Vrms
D. Both a and b
8 The bridge circuit of full wave rectification uses
A. one diode
B. two diode
C. three diode
D. four diode
9 Which of the following diode is used to derive the current in external circuit when light is incident in the circuit
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
10 Which of the following diodes can operate in the reverse biased condition
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these

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