Capacitor Questions and Answers

Practice Mode
Showing 10 of 48 questions
Q31
If a charged capacitor is disconnected from a circuit, it will:
  • A immediately discharge
  • B recharge
  • C remain charged
  • D leak the charge
Answer: Option D
Q32
The strength of an electric field at a given point is proportional to the potential difference on the plates and inversely proportional to the:
  • A plate separation
  • B negative plate only
  • C field strength
  • D charge difference
Answer: Option A
Q33
How is ac current related to ac voltage in a purely capacitive circuit?
  • A AC current is 0.707 of the ac voltage.
  • B AC current lags ac voltage.
  • C AC current is 0.637 of the ac voltage.
  • D AC current leads ac voltage.
Answer: Option D
Q34
For a given charge difference, electrostatic field strength varies according to:
  • A plate differential
  • B plate area
  • C plate distance
  • D dielectric quantity
Answer: Option B
Q35
A capacitor and an output resistor form a series circuit with a square wave applied. The circuit is:
  • A an integrator
  • B a differentiator
  • C a multiplier
  • D a divider
Answer: Option B
Q36
Capacitive reactance values connected in series offer
  • A an increase in total XC
  • B a decrease in total XC
  • C no change in total XC
  • D total opposition to voltage in the circuit
Answer: Option A
Q37
The quantity that represents an ideal capacitor dissipating 0 W of power is
  • A instantaneous power
  • B true power
  • C reactive power
  • D resistive power
Answer: Option B
Q38
If a capacitor is placed across a 20 V source, what will be the amount of charge after 5 tc?
  • A 5.0 V
  • B 12.8 V
  • C 13.5 V
  • D 20 V
Answer: Option D
Q39
What is the impedance of an ac RC parallel circuit if the resistance is 12 ohms and the capacitive reactance equals 5 ohms?
  • A 0.2 ohms
  • B 3.5 ohms
  • C 4.6 ohms
  • D 13 ohms
Answer: Option C
Q40
What is the Q (Quality factor) of a series circuit that resonates at 6 kHz, has equal reactance of 4 kilo-ohms each, and a resistor value of 50 ohms?
  • A 0.001
  • B 50
  • C 80
  • D 4.0
Answer: Option C

📚 More from Electronics

← All Topics 🎯 Practice ⏱️ Take Test 🔍 Search
Electronics
Back to Electronics
Other Subjects
Questions and Answers for Competitive Exams Various Entrance Test