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

An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is

Question # 2

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

Question # 3

In half wave rectification

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

The value of the input resistance of OP-AMP is of the order of

Question # 8

When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency

Question # 9

The phase angle of a series RLC circuit at resonance is

Question # 10

OP-AMP has the following input terminals

Question # 11

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

Question # 12

SI unit of impedance is

Question # 13

During each cycle, alternating voltage reaches a peak value

Question # 14

Which one of the following waves belongs to electromagnetic spectrum

Question # 15

Alternating current can induce voltage because it has a

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The phase at the positive peak of an A.C. cycle is:
A. 0º

B. 90º

C. 180º

D. 0 andᏘ
2 In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them
3 Which of the following diode is used for the detection of light
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them
4 The wave form of alternating voltage is the graph between:
A. Voltage across X-axis and time across y-axis
B. Current and time
C. Voltage along y-axis and time along x-axis
D. Voltage and current
5 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
6 The bridge circuit of full wave rectification uses
A. one diode
B. two diode
C. three diode
D. four diode
7 A changing magnetic flux creates around itself
A. An electromotive force
B. An electric field (changing electric flux)
C. Magnetic field
D. None of the above
8 At resonance, the phase angle for RLC series resonance circuit equals
A. 0°
B. 90°
C. 180°
D. 270°
9 The R1= infinity and R2= 0, then the gain of non-inverting amplifier is
A. zero
B. infinity
C. one
D. any one of these
10 When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency
A. 9.4 kHz
B. 940 kHz
C. 94 kHz
D. None of these

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