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

For normal operation of transistor, the batteries

Question # 2

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

Question # 3

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

Question # 4

The value of the input resistance of OP-AMP is of the order of

Question # 5

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

Question # 6

Which one of the following is correct?

Question # 7

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

Question # 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

Question # 9

Average value of A.C voltage during one cycle is

Question # 10

The time interval during which the Voltage source changes its polarity once is known as:

Question # 11

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

Question # 12

The highest value reached by the voltage or current:

Question # 13

For the normal operation of the transistor, its

Question # 14

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

Question # 15

Transmitting antenna emits

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 A P-N juction or semiconductor diode cannot be used as
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
2 Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:
A. Peak value
B. RMS value
C. Instantaneous value
D. Peak-to-peak value
3 Mathematical manipulation of the two quantized states can be best carried if they are represented by
A. high - low
B. yes - no
C. on - off
D. 0 - 1
4 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive
5 The RMS value of alternating current is:
A. 0.7 times at the peak value
B. 0.5 times the peak value
C. 0.7 times the Instantaneous value
D. Equal to maximum voltage
6 During the negative half-cycle of the half-wave rectification, the diode
A. does not conduct
B. conducts
C. either of these
D. none of these
7 The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its
A. Icwill decrease
B. VCEwill increase
C. ICwill increase
D. VCCwill increase
8 Alternating current is produced by a voltage source which polarity:
A. Remains the same
B. Reverse after period T
C. Keeps on reversing with time
D. Reverse after every time interval T/2
9 The R1= infinity and R2= 0, then the gain of non-inverting amplifier is
A. zero
B. infinity
C. one
D. any one of these
10 Chock consumes externally small
A. Charge
B. Current
C. Power
D. Potential

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