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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
A signal is amplified at the output without any change of phase, if it is applied at the
Question # 2
Which of the following diode is used to derive the current in external circuit when light is incident in the circuit
Question # 3
The amplifier which us used to perform mathematical operations electronically is known as
Question # 4
When the pn-junction is in reversed biased, current flows through the junction due to the
Question # 5
In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.
Question # 6
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 # 7
In series RC circuit when R=Xc, then the phase angle is
Question # 8
Transmitting antenna emits
Question # 9
The highest value reached by the voltage or current:
Question # 10
In RLC series circuit, resonance occurs when
Question # 11
When the pn-junction is connected reversed biased, its resistance is of the order of
Question # 12
Alternating current is produced by a voltage source which polarity:
Question # 13
The impedance of RLC series resonance circuit at resonant frequency is
Question # 14
A P-N juction or semiconductor diode cannot be used as
Question # 15
The wave form of alternating voltage is the graph between:
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Q Qura-tul-Ain Ansari 13 - Mar - 2023 06 Min 42 Sec 60/60 -
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M Muhammad Muzammil 11 - Mar - 2024 02 Min 14 Sec 30/60
ECAT Physics Chapter 16 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | In RLC series circuit, resonance occurs when |
A. XL > Xc
B. XL < Xc
C. XL = Xc
D. None of these
|
| 2 | 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
|
| 3 | Most OP-AMP operates with |
A. + 6 V supply
B. + 10 V supply
C. + 12 V supply
D. + 24 V supply
|
| 4 | The input resistance of the OP-AMP is the resistance between the |
A. (-) input and output
B. (+) input and output
C. (-) and (+) inputs
D. between any inputs
|
| 5 | Which one of the following is correct? |
A. Vo= 1.414 Vrms
B. Iams= 1.414 Io
C. VO = 10.70 Vrms
D. Both a and b
|
| 6 | When the emitter-base junction of a transistor is reverse biased, collector current |
A. Reverses
B. Increases
C. Decreases
D. Stops
|
| 7 | The waveform of alternating voltage is a: |
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
|
| 8 | Which of the following diode is used for the detection of light |
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them
|
| 9 | A resonance curve for RLC series circuit is a plot of frequency versus |
A. Voltage
B. Current
C. Impedance
D. Reactance
|
| 10 | To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance |
A. 5.07 pF
B. 50 pF
C. 0.507 pF
D. 507 pF
|
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