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 basic circuit elements of A.C circuit are

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

The alternative voltage of current is actually measured by:

Question # 8

An A.C varies as a function of

Question # 9

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

Question # 10

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

Question # 11

The impedance of RLC series resonance circuit at resonant frequency is

Question # 12

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

Question # 13

OP-AMP has the following input terminals

Question # 14

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

Question # 15

Most OP-AMP operates with

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 When the emitter-base junction of a transistor is reverse biased, collector current
A. Reverses
B. Increases
C. Decreases
D. Stops
2 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
3 The wave form of alternating voltage is the graph between:
A. Voltage across X-axis and time across y-axis
B. Current and time
C. Voltage along y-axis and time along x-axis
D. Voltage and current
4 Peak value of alternative current is:
A. one of its Instantaneous value
B. Equal to its RMS value
C. The same as its peak-to-peak value
D. Both (B) and (C)
5 The highest value reached by the voltage or current:
A. In quarter cycle is called Instantaneous value
B. In half cycle is called peak-to-peak value
C. In one cycle is called peak value
D. In half cycle is called Instantaneous value
6 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant
7 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
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 Nowadays, Most of the electric energy is produced by the A.C. generators using:
A. Hydal water
B. Geothermal energy
C. Solar energy
D. Biomass
10 The time interval during which the Voltage source changes its polarity once is known as:
A. Time period T
B. Half the time period
C. Quarter the time period
D. Two third of the time period

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