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

Question # 2

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

Question # 3

At resonance frequency the impedance of parallel resonance circuit is

Question # 4

The bridge circuit of full wave rectification uses

Question # 5

In frequency modulation (FM), the carrier waves amplitude

Question # 6

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

Question # 7

For normal operation of transistor, the batteries

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

In free space, the speed of electromagnetic waves is

Question # 12

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

Question # 13

Alternating current can be transmitted:

Question # 14

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

Question # 15

The most common source of alternating voltage is:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 The bridge circuit of full wave rectification uses
A. one diode
B. two diode
C. three diode
D. four diode
3 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
4 When the p-n junction is forward biased its resistance is of the order of
A. few mega ohms
B. few kilo ohms
C. few ohms
D. few milli ohms
5 The alternative voltage of current is actually measured by:
A. Its RMS value
B. Square root of its mean square value
C. Instantaneous value
D. Peak value
6 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none of these
7 Which one of the following waves belongs to electromagnetic spectrum
A. Radio and TV waves
B. Radar waves
C. Micro waves
D. All of them
8 The circuit which is used to smooth the output voltage of the full-wave rectification is known as
A. transformer
B. rectifier
C. filter
D. none of these
9 When the pn-junction is connected reversed biased, its resistance is of the order of
A. few ohms
B. few kilo-ohms
C. few mega-ohms
D. few mili-ohms
10 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

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