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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
The value of current gain of n-p-n transistor is of the order of
Question # 2
A digital system deals with quantities or variables which have
Question # 3
The input resistance of the OP-AMP is the resistance between the
Question # 4
In a transistor, the central region is called
Question # 5
Which of the following has a great concentration of impurity
Question # 6
The r.m.s. value of alternating current is equal to its maximum value at angle of
Question # 7
The basic circuit element in A.C. circuits are:
Question # 8
The entire wave form of sinusoidal voltage is actually a set of all the:
Question # 9
An A.C varies as a function of
Question # 10
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 # 11
For a n-p-n transistor, the conventional current equation can be written as
Question # 12
The highest value reached by the voltage or current:
Question # 13
Nowadays, Most of the electric energy is produced by the A.C. generators using:
Question # 14
If the value of C in a series RLC circuit is increased, the resonant frequency
Question # 15
In free space, the speed of electromagnetic waves is
Top Scorers Of ECAT Physics Chapter 16 Alternating Current MCQ`s Test
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S Sana Hashim 20 - May - 2022 00 Min 05 Sec 60/60 -
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 -
A Abdullah Baloch 02 - Aug - 2024 02 Min 33 Sec 55/60 -
A Alishba Farooq 09 - Mar - 2024 16 Min 16 Sec 55/60 -
D dark goblin 19 - Jul - 2024 00 Min 39 Sec 50/60 -
S suzi 10 - Feb - 2026 01 Min 47 Sec 48/60 -
M Muhammad Rizwan 11 - Jul - 2022 02 Min 39 Sec 45/60 -
S Sarmad 18 - Jun - 2022 07 Min 03 Sec 45/60 -
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 -
M Muhammad Muzammil 11 - Mar - 2024 02 Min 14 Sec 30/60
ECAT Physics Chapter 16 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | In half wave rectification |
A. both halves of the input voltage is used
B. only one half of the input voltage is used
C. either of these
D. none of these
|
| 2 | The impedance of RLC series resonance circuit at resonant frequency is |
A. Greater than R
B. Equal to R
C. Less than R
D. None of these
|
| 3 | When the emitter-base junction of a transistor is reverse biased, collector current |
A. Reverses
B. Increases
C. Decreases
D. Stops
|
| 4 | The R1= infinity and R2= 0, then the gain of non-inverting amplifier is |
A. zero
B. infinity
C. one
D. any one of these
|
| 5 | Conversion of alternating current into direct current is called |
A. amplification
B. rectification
C. conduction
D. polarization
|
| 6 | The average of A.C. current and voltage over a complete cycle is |
A. Maximum
B. zero
C. Neither zero nor maximum
D. None of these
|
| 7 | The RMS value of alternating current is: |
A. 0.7 times at the peak value
B. 0.5 times the peak value
C. 0.7 times the Instantaneous value
D. Equal to maximum voltage
|
| 8 | When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency |
A. 9.4 kHz
B. 940 kHz
C. 94 kHz
D. None of these
|
| 9 | 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
|
| 10 | Which of the following has a great concentration of impurity |
A. base
B. emitter
C. collector
D. none of these
|
Test Questions