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

Transmitting antenna emits

Question # 2

In an A.C circuit with resistor only, the current and voltage have a phase angle of

Question # 3

For the normal operation of the transistor, its

Question # 4

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

Question # 5

The phase angle of a series RLC circuit at resonance is

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

A resonance curve for RLC series circuit is a plot of frequency versus

Question # 10

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

Question # 11

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

Question # 12

When either L or C is increased, the resonant frequency of the RLC series circuit

Question # 13

In RLC series circuit, resonance occurs when

Question # 14

To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
2 At higher frequency of the alternating current, the capacitive reactance Xc
A. Increases
B. Decreases
C. Remains the same
D. Increases only when the voltage increases
3 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
4 Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length
A. X-rays
B. Ultraviolet rays
C. y-rays
D. Cosmic rays
5 The bridge circuit of full wave rectification uses
A. one diode
B. two diode
C. three diode
D. four diode
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 The value of output resistance of OP-AMOP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several mega ohms
8 A sinusoidally alternating voltage or current can be graphically represented by a:
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
9 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
10 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

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