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 total reactance of a series RLC circuit at resonance is

Question # 2

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

Question # 3

When the pn-junction is connected reversed biased, its resistance is of the order of

Question # 4

The length of rotating vector (on a certain scale) represents the:

Question # 5

For a n-p-n transistor, the conventional current equation can be written as

Question # 6

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

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

A digital system deals with quantities or variables which have

Question # 9

Which one of the following is correct?

Question # 10

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

Question # 11

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

Question # 12

The R1= infinity and R2= 0, then the gain of non-inverting amplifier is

Question # 13

At resonance, the phase angle for RLC series resonance circuit equals

Question # 14

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

Question # 15

An A.C varies as a function of

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
3 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
4 The bridge circuit of full wave rectification uses
A. one diode
B. two diode
C. three diode
D. four diode
5 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
6 The value of the input resistance of OP-AMP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several maga ohms
7 A P-N juction or semiconductor diode cannot be used as
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
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 An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current
A. Decreases
B. Increases
C. Does not change
D. Momentarily goes to zero
10 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

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