JEE Main · Physics

Current electricity

12 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 12 questions

  1. Two resistors of and are connected in parallel. What is the equivalent resistance (in )?
  2. Two resistors of and are connected in parallel. What is the equivalent resistance (in )?
  3. Two resistors of and are connected in parallel. What is the equivalent resistance (in )?
  4. Three resistors of , and are connected in series across a battery. What is the current (in A)?
  5. Three resistors of , and are connected in series across a battery. What is the current (in A)?
  6. Two cells, one of emf and internal resistance , the other of emf and internal resistance , are connected in parallel (like poles together) across an e…
  7. An infinite ladder network is made of identical sections, each with a resistor in series and a resistor connected across the line after it. What is the equivalent resistance be…
  8. A uniform wire of resistance is stretched uniformly to twice its length (its volume stays constant). It is then cut into four equal pieces, and the four pieces are connected in parallel.…
  9. A capacitor, initially uncharged, is charged through a resistor from a constant source. After what time does the energy stored in the capacitor reach half of its…
  10. A battery of emf and internal resistance is connected to a fixed resistor in parallel with a variable resistor . The maximum power that can be delivered to…
  11. Two resistors of and are connected in parallel. What is the equivalent resistance (in )?
  12. Two resistors of and are connected in parallel. What is the equivalent resistance (in )?

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