ECAT Pre Computer Science Chapter 16 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 16 Alternating Current

Try The MCQ's Test For ECAT Physics Chapter 16 Alternating Current

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ECAT Physics Chapter 16 Alternating Current

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Question # 1

The magnitude of alternative voltage V:

Question # 2

Mathematical manipulation of the two quantized states can be best carried if they are represented by

Question # 3

For a n-p-n transistor, the conventional current equation can be written as

Question # 4

Nowadays, Most of the electric energy is produced by the A.C. generators using:

Question # 5

In describing functions of digital systems, a closed switch will be shown as

Question # 6

For normal operation of transistor, the batteries

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

Peak value of alternative current is:

Question # 11

Chock consumes externally small

Question # 12

The alternative voltage of current is actually measured by:

Question # 13

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

Question # 14

Which one of the following waves belongs to electromagnetic spectrum

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 A signal is amplified at the output without any change of phase, if it is applied at the
A. inverting input
B. non-inverting input
C. at any of the input
D. none of these
2 The phase angle of a series RLC circuit at resonance is
A. 180°
B. 90°
C. 0°
D. None of the these
3 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
4 A diode characteristic curve is a plot between
A. current and time
B. voltage and time
C. voltage and current
D. forward voltage and reversed voltage
5 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive
6 An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current
A. Decreases
B. Increases
C. Does not change
D. Momentarily goes to zero
7 At resonance, the phase angle for RLC series resonance circuit equals
A. 0°
B. 90°
C. 180°
D. 270°
8 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
9 For normal operation of transistor, the batteries
A. VCCis of much lower value than VBB
B. VCCis of much higher value than VBB
C. VCC is equal toVBB
D. none of these
10 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant

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