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

Question # 2

Transmitting antenna emits

Question # 3

In a normally biased n-p-n transistor, an electron c current IEflows from the

Question # 4

Alternating current can be transmitted:

Question # 5

A changing magnetic flux creates around itself

Question # 6

The output voltage of half wave rectification is in the form of

Question # 7

SI unit of impedance is

Question # 8

The circuit which is used to smooth the output voltage of the full-wave rectification is known as

Question # 9

When the p-n junction is forward biased its resistance is of the order of

Question # 10

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

Question # 11

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

Question # 12

For the normal operation of the transistor, its

Question # 13

During the positive half-cycle in the half-wave rectification,the diode

Question # 14

The closed loop gain of the non-inverting amplifier is given by

Question # 15

In which of the following components, pn-junction is used

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 In series RC circuit when R=Xc, then the phase angle is
A. 0°
B. 90°
C. 70°
D. 45°
2 The Instantaneous value of alternative current maybe:
A. The same as its RMS value
B. Greater than its Rms value
C. The same as its peak value
D. Any of these
3 A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at
A. inverting input
B. non-inverting input
C. any one of the input terminal
D. none of them
4 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
5 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
6 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
7 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
8 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
9 The phase at the positive peak of an A.C. cycle is:
A. 0º

B. 90º

C. 180º

D. 0 andᏘ
10 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none of these

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