Electrical Circuits MCQs
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At what frequency will an inductor of 5mH have the same reactance as a capacitor of 0.1 μF?
- A. 7.12 kHz
- B. 7.12 Hz
- C. 7.12 MHz
- D. 7.12 GHz
- Correct Answer: Option A
VL = VC in a series RLC circuit when
- A. The value of the impedance is minimum
- B. The power factor is zero
- C. The current leads the total voltage by 90˚
- D. The total voltage is zero
- Correct Answer: Option A
In liquids and gases, ionization current results from a flow of
- A. Positive or negative ions
- B. Free electrons
- C. Ions that are lighter in weight than electrons
- D. Protons
- Correct Answer: Option B
What is the reciprocal of quality factor?
- A. Power factor
- B. Reactive factor
- C. Dissipation factor
- D. 1/Q factor
- Correct Answer: Option C
The ratio of W/VA in an ac circuit means
- A. Power factor
- B. Reactive factor
- C. Quality factor
- D. Load factor
- Correct Answer: Option A
The symbol Q refers to
- A. Resonance quotient
- B. Quality factor
- C. Power quotient
- D. Qualification test
- Correct Answer: Option D
Series resonance occurs when
- A. XL = XC
- B. XL = R
- C. Z = R
- D. Both A and C
- Correct Answer: Option D
Electron flow assumes charges flow from
- A. Negative to positive
- B. Negative to negative
- C. Positive to negative
- D. Positive to positive
- Correct Answer: Option A
Conventional flow assumes charges flow from
- A. Positive to negative
- B. Positive to positive
- C. Negative to positive
- D. Negative to negative
- Correct Answer: Option A