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

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

Question # 2

The value of the potential difference across the depletion region for the case of germanium is

Question # 3

The phase angle of a series RLC circuit at resonance is

Question # 4

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

Question # 5

In half wave rectification

Question # 6

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

Question # 7

The average of A.C. current and voltage over a complete cycle is

Question # 8

The most common source of alternating voltage is:

Question # 9

A digital system deals with quantities or variables which have

Question # 10

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

Question # 11

The basic circuit element in A.C. circuits are:

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

The impedance of RLC series resonance circuit at resonant frequency is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The value of output resistance of OP-AMOP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several mega ohms
2 When the pn-junction is connected reversed biased, its resistance is of the order of
A. few ohms
B. few kilo-ohms
C. few mega-ohms
D. few mili-ohms
3 For a n-p-n transistor, the conventional current equation can be written as
A. IE+ IC= IB
B. IC- IB= IE
C. IC+ IB= IE
D. IB+ IE= IC
4 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
5 Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:
A. Peak value
B. RMS value
C. Instantaneous value
D. Peak-to-peak value
6 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
7 When the p-n junction is forward biased its resistance is of the order of
A. few mega ohms
B. few kilo ohms
C. few ohms
D. few milli ohms
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 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
10 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge

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