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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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Total Questions15
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Time Allowed20
ECAT Physics Chapter 16 Alternating Current
00:00
Question # 1
Nowadays, Most of the electric energy is produced by the A.C. generators using:
Question # 2
The bridge circuit of full wave rectification uses
Question # 3
At resonance frequency the impedance of parallel resonance circuit is
Question # 4
The wave form of alternating voltage is the graph between:
Question # 5
In a transistor, the central region is called
Question # 6
Which of the following diode is used for the detection of light
Question # 7
When the pn-junction is connected reversed biased, its resistance is of the order of
Question # 8
The amplifier which us used to perform mathematical operations electronically is known as
Question # 9
In half wave rectification
Question # 10
The R1= infinity and R2= 0, then the gain of non-inverting amplifier is
Question # 11
The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its
Question # 12
The most common source of alternating voltage is:
Question # 13
Which of the following diodes can operate in the reverse biased condition
Question # 14
For normal operation of transistor, the batteries
Question # 15
In n-p-n transistor, emitter base junction is kept
Top Scorers Of ECAT Physics Chapter 16 Alternating Current MCQ`s Test
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A Anayat Ali 26 - Mar - 2024 00 Min 06 Sec 60/60 -
H Heer 02 - Jan - 2024 00 Min 42 Sec 60/60 -
Q Qura-tul-Ain Ansari 13 - Mar - 2023 06 Min 42 Sec 60/60 -
M Muneeb ur Rehman 29 - Jun - 2026 01 Min 47 Sec 56/60 -
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M Muhammad Rizwan 11 - Jul - 2022 02 Min 39 Sec 45/60 -
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H HAMZA Shah 20 - Sep - 2021 01 Min 11 Sec 40/60 -
M Muqadas Zahra 13 - Apr - 2022 14 Min 05 Sec 40/60 -
S Shaeel Fatima 24 - Feb - 2023 01 Min 10 Sec 35/60 -
T tehreemnadeem 11 - Jul - 2022 04 Min 13 Sec 35/60
ECAT Physics Chapter 16 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | The open loop gain of OP-AMP is of the order of |
A. 102
B. 103
C. 104
D. 105
|
| 2 | The r.m.s. value of alternating current is equal to its maximum value at angle of |
A. 60°
B. 45°
C. 30°
D. 90°
|
| 3 | 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
|
| 4 | The closed loop gain of the non-inverting amplifier is given by |
A. G = R2/R1
B. G = -R2/R1
C. G = 1 - R2/R1
D. G = 1 + T2/R1
|
| 5 | 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 |
A. 2nd group
B. fourth group
C. fifth group
D. sixth group
|
| 6 | When the emitter-base junction of a transistor is reverse biased, collector current |
A. Reverses
B. Increases
C. Decreases
D. Stops
|
| 7 | Alternating current can induce voltage because it has a |
A. High peak value
B. Varying magnetic field
C. Stronger field than direct curren
D. Constant magnetic field
|
| 8 | 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
|
| 9 | The bridge circuit of full wave rectification uses |
A. one diode
B. two diode
C. three diode
D. four diode
|
| 10 | The amplifier which us used to perform mathematical operations electronically is known as |
A. calculator
B. OP-AMP
C. computer
D. any one of them
|
Test Questions
Share your comments & questions here
Iiqra Fatima
25 May 2018You should let us practice difficult mcqs ..These are too easy for ECAT level....Thanku