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

The r.m.s. value of alternating current is equal to its maximum value at angle of

Question # 2

Most OP-AMP operates with

Question # 3

The entire wave form of sinusoidal voltage is actually a set of all the:

Question # 4

At resonance, the impedance of RLC series circuit is

Question # 5

The wave form of alternating voltage is the graph between:

Question # 6

The closed loop gain of the inverting amplifier is written as

Question # 7

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

Question # 8

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

Question # 9

The RMS value of alternating current is:

Question # 10

OP-AMP has the following input terminals

Question # 11

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

Question # 12

Alternating current can induce voltage because it has a

Question # 13

In a transistor, the central region is called

Question # 14

At resonance frequency the impedance of parallel resonance circuit is

Question # 15

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its
A. Icwill decrease
B. VCEwill increase
C. ICwill increase
D. VCCwill increase
3 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
4 At resonance, the phase angle for RLC series resonance circuit equals
A. 0°
B. 90°
C. 180°
D. 270°
5 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
6 Transmitting antenna emits
A. Magnetic waves
B. Electric waves
C. Electromagnetic waves
D. Sound waves
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 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
9 Alternating current can be transmitted:
A. To long distance
B. At very high cost
C. At very low cost
D. Both (A) and (C)
10 If 250V is the RMS value of alternative voltage, then its peak value Vowill be:
A. 353.5V
B. 250V
C. 175V
D. zero

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