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

Question # 2

The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its

Question # 3

The sum of positive and negative peak values is called:

Question # 4

The power factor of resonant series circuit is

Question # 5

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

Question # 6

When the emitter-base junction of a transistor is reverse biased, collector current

Question # 7

At resonance, the impedance of RLC series circuit is

Question # 8

In a transistor, the central region is called

Question # 9

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

Question # 10

The Instantaneous value of alternative current maybe:

Question # 11

During each cycle, alternating voltage reaches a peak value

Question # 12

A digital system deals with quantities or variables which have

Question # 13

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

Question # 14

The most common source of alternating voltage is:

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 The closed loop gain of the non-inverting amplifier is given by
A. G = R2/R1
B. G = -R2/R1
C. G = 1 - R2/R1
D. G = 1 + T2/R1
3 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none of these
4 Alternating current can induce voltage because it has a
A. High peak value
B. Varying magnetic field
C. Stronger field than direct curren
D. Constant magnetic field
5 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
6 If we connect a A.C. volt meter to read A.C. voltage, It would read its:
A. RMS value
B. Instantaneous value
C. Valued average over a cycle
D. Zero
7 In a transistor, if the central region is n-type, then this type of transistor is known as
A. n-p-n transistor
B. p-n-p transistor
C. either of these
D. none of these
8 A p-n junction is formed when a crystal of silicon is growth in such a way that its one half is doped with trivalent impurity and the other half with a impurity from
A. 2nd group
B. fourth group
C. fifth group
D. sixth group
9 Average value of A.C voltage during one cycle is
A. 1
B. Zero
C. Maximum
D. Variable
10 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

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