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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
If 250V is the RMS value of alternative voltage, then its peak value Vowill be:
Question # 2
In a transistor, if the central region is n-type, then this type of transistor is known as
Question # 3
Which of the following has a great concentration of impurity
Question # 4
In n-p-n transistor, emitter base junction is kept
Question # 5
In RLC series circuit, resonance occurs when
Question # 6
The alternative voltage of current is actually measured by:
Question # 7
Electromagnetic waves transmit energy equal to
Question # 8
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 # 9
When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency
Question # 10
An A.C varies as a function of
Question # 11
Which one of the following is correct?
Question # 12
A signal is amplified at the output without any change of phase, if it is applied at the
Question # 13
When the pn-junction is connected reversed biased, its resistance is of the order of
Question # 14
At resonance frequency the impedance of parallel resonance circuit is
Question # 15
An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage 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 -
M Muneeb ur Rehman 29 - Jun - 2026 01 Min 47 Sec 56/60 -
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
ECAT Physics Chapter 16 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current |
A. Decreases
B. Increases
C. Does not change
D. Momentarily goes to zero
|
| 2 | 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
|
| 3 | 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
|
| 4 | At higher frequency of the alternating current, the capacitive reactance Xc |
A. Increases
B. Decreases
C. Remains the same
D. Increases only when the voltage increases
|
| 5 | The open loop gain of OP-AMP is of the order of |
A. 102
B. 103
C. 104
D. 105
|
| 6 | 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
|
| 7 | 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
|
| 8 | The waveform of alternating voltage is a: |
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
|
| 9 | In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted. |
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them
|
| 10 | 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
|
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