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 highest value reached by the voltage or current:

Question # 2

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

Question # 3

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

Question # 4

In a transistor, the central region is called

Question # 5

Which one of the following is correct?

Question # 6

The value of output resistance of OP-AMOP is of the order of

Question # 7

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

Question # 8

In half wave rectification

Question # 9

The alternative voltage of current is actually measured by:

Question # 10

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

Question # 11

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

Question # 12

When the pn-junction is in reversed biased, current flows through the junction due to the

Question # 13

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

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 The closed loop gain of the inverting amplifier is written as
A. G = R2/R1
B. G = 1 + R2/R1
C. G = -R2/R1
D. G = 1 - R2/R1
4 In a normally biased n-p-n transistor, an electron c current IEflows from the
A. emitter into the base
B. collector into the base
C. base into collector
D. none of these
5 During the positive half-cycle in the half-wave rectification,the diode
A. does not conduct
B. conducts
C. either of these
D. neither of these
6 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
7 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
8 A digital system deals with quantities or variables which have
A. only one state
B. only two discrete states
C. three discrete states
D. four discrete states
9 The average of A.C. current and voltage over a complete cycle is
A. Maximum
B. zero
C. Neither zero nor maximum
D. None of these
10 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

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