Electrical Circuits MCQs
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The charge in the capacitor is stored at the
- A. Terminals
- B. Plates
- C. Dielectric
- D. Air
- Correct Answer: Option B
The voltage cannot be exactly in phase with the current in a circuit that contains
- A. Only capacitance
- B. Only resistance
- C. Inductance and capacitance
- D. Inductance, capacitance and resistance
- Correct Answer: Option A
A capacitance of 6 µµF means
- A. 6 pF
- B. 6 nF
- C. 6 fF
- D. 6 μF
- Correct Answer: Option A
An ideal current source has an internal conductance of _________ siemen(s)
- A. Infinite
- B. One
- C. Zero
- D. One million
- Correct Answer: Option C
What is the resonant frequency of a circuit when L of 25 microhenrys and C of 10 picofarads are in parallel?
- A. 10.1 kHz
- B. 10.1 MHz
- C. 101 MHz
- D. 101 kHz
- Correct Answer: Option B
Which of the following does not refer to electrical energy?
- A. Volt-ampere
- B. Joule
- C. Watt-second
- D. Volt-coulomb
- Correct Answer: Option A
Which of the following is the most popular waveform?
- A. Sinusoidal
- B. Square wave
- C. Triangular
- D. Sawtooth
- Correct Answer: Option A
The graph between an alternating quantity and time is called
- A. Sine wave
- B. Curve
- C. Waveform
- D. A plot
- Correct Answer: Option C
A trigger circuit consisting of a capacitor of 0.01 μF is connected in series with a resistor. If the circuit requires 100 Vdc to operate, determine the value of the resistor when time constant is 0.009s.
- A. 900 Ω
- B. 900 kΩ
- C. 900 MΩ
- D. 900 GΩ
- Correct Answer: Option B
A 0.09 microfarad capacitor is charged to 220 volts. How long in milliseconds will it discharged resistor has a resistance of 20,000 ohms?
- A. 1.5
- B. 2.5
- C. 1.25
- D. 0.5
- Correct Answer: Option C