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

Question # 2

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

Question # 3

At resonance, the impedance of RLC series circuit is

Question # 4

The output voltage of half wave rectification is in the form of

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

The closed loop gain of the non-inverting amplifier is given by

Question # 9

A digital system deals with quantities or variables which have

Question # 10

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

Question # 11

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

Question # 12

The alternative voltage of current is actually measured by:

Question # 13

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

Question # 14

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

Question # 15

The closed loop gain of the inverting amplifier is written as

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The device which allows only the flow of an A.C. through a circuit is
A. Capacitor
B. Inductor
C. D.C. motor
D. Battery
2 The closed loop gain of the inverting amplifier is written as
A. G = R2/R1
B. G = 1 + R2/R1
C. G = -R2/R1
D. G = 1 - R2/R1
3 If the value of C in a series RLC circuit is increased, the resonant frequency
A. Is not affected
B. Increase
C. Remains the same
D. Decreases
4 During each cycle, alternating voltage reaches a peak value
A. One time
B. Two times
C. Four times
D. A number of times depending on the frequency
5 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
6 In series RC circuit when R=Xc, then the phase angle is
A. 0°
B. 90°
C. 70°
D. 45°
7 Alternating current can be transmitted:
A. To long distance
B. At very high cost
C. At very low cost
D. Both (A) and (C)
8 In free space, the speed of electromagnetic waves is
A. 3 x 108ms-1
B. 3 x 106ms-1
C. 4 x 107ms-1
D. 3 x 109ms-1
9 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
10 The output voltage of half wave rectification is in the form of
A. a smooth curve
B. a smooth wave
C. pulses
D. all of the above

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