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

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

Question # 2

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

Question # 3

In n-p-n transistor, emitter base junction is kept

Question # 4

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

Question # 5

An A.C varies as a function of

Question # 6

The input resistance of the OP-AMP is the resistance between the

Question # 7

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

Question # 8

Which one of the following waves belongs to electromagnetic spectrum

Question # 9

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

Question # 10

The device which allows only the flow of an A.C. through a circuit is

Question # 11

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

Question # 12

Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is

Question # 13

The closed loop gain of the inverting amplifier is written as

Question # 14

Alternating current can induce voltage because it has a

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 To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance
A. 5.07 pF
B. 50 pF
C. 0.507 pF
D. 507 pF
2 In a transistor, if the central region is n-type, then this type of transistor is known as
A. n-p-n transistor
B. p-n-p transistor
C. either of these
D. none of these
3 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
4 When either L or C is increased, the resonant frequency of the RLC series circuit
A. Increases
B. Decreases
C. Remains the same
D. Becomes zero
5 In which of the following components, pn-junction is used
A. light emitting diode
B. photo diode
C. photo voltaic cell
D. all of these
6 In describing functions of digital systems, a closed switch will be shown as
A. 0
B. 1
C. low
D. any one of these
7 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
8 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three
9 The device which allows only the flow of an A.C. through a circuit is
A. Capacitor
B. Inductor
C. D.C. motor
D. Battery
10 The length of rotating vector (on a certain scale) represents the:
A. Peak value of alternating quantity
B. RMS value of alternating quantity
C. Instantaneous value of alternating quantity
D. Either (B) or (C)

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