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

In frequency modulation (FM), the carrier waves amplitude

Question # 2

The magnitude of alternative voltage V:

Question # 3

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

Question # 4

A sinusoidally alternating voltage or current can be graphically represented by a:

Question # 5

The closed loop gain of the inverting amplifier is written as

Question # 6

The bridge circuit of full wave rectification uses

Question # 7

Average value of A.C voltage during one cycle is

Question # 8

Chock consumes externally small

Question # 9

In RLC series circuit, resonance occurs when

Question # 10

In a transistor, the central region is called

Question # 11

Alternating current is produced by a voltage source which polarity:

Question # 12

A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at

Question # 13

Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length

Question # 14

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

Question # 15

A p-n junction is formed when a crystal of silicon is growth in such a way that its one half is doped with trivalent impurity and the other half with a impurity from

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
2 Which of the following diode is used to derive the current in external circuit when light is incident in the circuit
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
3 If we connected the ordinary DC ammeter to measure alternating current, it would measure its:
A. Instantaneous value
B. RMS value
C. Value averaged over a cycle
D. Either (B) or (C)
4 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
5 If 250V is the RMS value of alternative voltage, then its peak value Vowill be:
A. 353.5V
B. 250V
C. 175V
D. zero
6 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
7 The wave form of alternating voltage is the graph between:
A. Voltage across X-axis and time across y-axis
B. Current and time
C. Voltage along y-axis and time along x-axis
D. Voltage and current
8 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
9 Nowadays, Most of the electric energy is produced by the A.C. generators using:
A. Hydal water
B. Geothermal energy
C. Solar energy
D. Biomass
10 Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is
A. zero
B. small
C. large
D. very large

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