Bagrut (Secondary School Matriculation) · Physics

Electricity

13 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 13 questions

  1. Two resistors of 20 ohms and 30 ohms are connected in parallel. What is the equivalent resistance?
  2. A 10 ohm heater carries a current of 3 A. What power does it dissipate?
  3. Two point charges of 3 microcoulomb and 2 microcoulomb are 0.1 m apart in vacuum. What is the force between them? (k = 9 x 10^9 N m^2 / C^2)
  4. A 20 microfarad capacitor charges through a 20 kilohm resistor. What is the time constant of the circuit?
  5. Two resistors of 6 ohms and 12 ohms are connected in parallel. What is the equivalent resistance?
  6. A 20 ohm heater carries a current of 3 A. What power does it dissipate?
  7. A 50 microfarad capacitor charges through a 5 kilohm resistor. What is the time constant of the circuit?
  8. Two point charges of 3 microcoulomb and 3 microcoulomb are 0.3 m apart in vacuum. What is the force between them? (k = 9 x 10^9 N m^2 / C^2)
  9. A 200 microfarad capacitor charges through a 2 kilohm resistor. What is the time constant of the circuit?
  10. A 25 ohm heater carries a current of 3 A. What power does it dissipate?
  11. A 100 microfarad capacitor charges through a 1 kilohm resistor. What is the time constant of the circuit?
  12. Two resistors of 6 ohms and 3 ohms are connected in parallel. What is the equivalent resistance?
  13. A 10 microfarad capacitor charges through a 2 kilohm resistor. What is the time constant of the circuit?

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