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

When the pn-junction is connected reversed biased, its resistance is of the order of

Question # 2

Chock consumes externally small

Question # 3

Alternating current can be transmitted:

Question # 4

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

Question # 5

An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current

Question # 6

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

Question # 7

In half wave rectification

Question # 8

In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.

Question # 9

Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:

Question # 10

A signal is amplified at the output without any change of phase, if it is applied at the

Question # 11

The highest value reached by the voltage or current:

Question # 12

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

Question # 13

The RMS value of alternating current is:

Question # 14

The total reactance of a series RLC circuit at resonance is

Question # 15

The basic circuit element in D.C. circuit is:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)
2 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
3 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
4 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
5 The value of the input resistance of OP-AMP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several maga ohms
6 The r.m.s. value of alternating current is equal to its maximum value at angle of
A. 60°
B. 45°
C. 30°
D. 90°
7 The RMS value of alternating current is:
A. 0.7 times at the peak value
B. 0.5 times the peak value
C. 0.7 times the Instantaneous value
D. Equal to maximum voltage
8 The basic circuit element in A.C. circuits are:
A. Resistor and capacitor
B. Resistor and Inductor
C. Capacitor only
D. Both (B) and (C)
9 In describing functions of digital systems, a closed switch will be shown as
A. 0
B. 1
C. low
D. any one of these
10 Chock consumes externally small
A. Charge
B. Current
C. Power
D. Potential

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