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

In a transistor, the central region is called

Question # 2

The RMS value of alternating current is:

Question # 3

The device which allows only the flow of an A.C. through a circuit is

Question # 4

At resonance frequency the impedance of parallel resonance circuit is

Question # 5

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

Question # 6

Alternating current can be transmitted:

Question # 7

The phase angle of a series RLC circuit at resonance is

Question # 8

In describing functions of digital systems, a closed switch will be shown as

Question # 9

When the pn-junction is forward biased. the current flows through it is of the order of

Question # 10

A P-N juction or semiconductor diode cannot be used as

Question # 11

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

Question # 12

The alternative voltage of current is actually measured by:

Question # 13

The entire wave form of sinusoidal voltage is actually a set of all the:

Question # 14

In series RC circuit when R=Xc, then the phase angle is

Question # 15

The value of output resistance of OP-AMOP is of the order of

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive
2 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
3 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
4 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
5 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
6 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
7 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
8 The bridge circuit of full wave rectification uses
A. one diode
B. two diode
C. three diode
D. four diode
9 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
10 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

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