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

Alternating current can induce voltage because it has a

Question # 3

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

Question # 4

In RLC series circuit, resonance occurs when

Question # 5

In frequency modulation (FM), the carrier waves amplitude

Question # 6

If 250V is the RMS value of alternative voltage, then its peak value Vowill be:

Question # 7

In a transistor, the central region is called

Question # 8

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

Question # 9

A diode characteristic curve is a plot between

Question # 10

The input resistance of the OP-AMP is the resistance between the

Question # 11

The Instantaneous value of alternative current maybe:

Question # 12

The value of current gain of n-p-n transistor is of the order of

Question # 13

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

Question # 14

In which of the following components, pn-junction is used

Question # 15

At resonance, the impedance of RLC series circuit is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Transmitting antenna emits
A. Magnetic waves
B. Electric waves
C. Electromagnetic waves
D. Sound waves
2 The value of the potential difference across the depletion region for the case of germanium is
A. 0.3 V
B. 0.5 V
C. 0.7 V
D. 0.9 V
3 A P-N juction or semiconductor diode cannot be used as
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
4 In a normally biased n-p-n transistor, an electron c current IEflows from the
A. emitter into the base
B. collector into the base
C. base into collector
D. none of these
5 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)
6 For the normal operation of the transistor, its
A. emitter-base and collector base junctions are forward biased
B. emitter-base junction is reversed biased and collector base junction is forward biased
C. emitter-base junction is forward biased and collector-base junction is reverse biased
D. any one of these
7 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
8 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
9 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
10 When either L or C is increased, the resonant frequency of the RLC series circuit
A. Increases
B. Decreases
C. Remains the same
D. Becomes zero

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