Moderate

Two unequal resistances are connected parallel across a battery. Which of the following statements is true?

Correct answer: B. Current through smaller resistance is higher

  • A. Same current will flow through both resistances
  • B. Current through smaller resistance is higher
  • C. Current through larger resistance is higher
  • D. Current can be higher in any resistance depending on emf of the cell

Explanation

Option A: The current cannot be the same through both resistances, because the resistances are different. Option B: The current through the smaller resistance is higher. In a parallel circuit, the voltage across each resistor is the same, but the current through each resistor is different. The current is inversely proportional to the resistance, so the current through the smaller resistance will be higher than the current through the larger resistance. Option C: The current cannot be the same through both resistances, because the resistances are different. Option D: The current cannot be higher through the larger resistance, because the current is inversely proportional to the resistance. The current cannot be higher in any resistance depending on the emf of the cell, because the emf of the cell only determines the voltage across the resistors, not the current through the resistors.

Last updated

About Current Electricity

Steady current relates charge flow to potential difference, resistance and resistivity, including how temperature changes a conductor's resistance. Sources with internal resistance have terminal voltage below their emf when delivering current, and maximum power output occurs under a specific load condition rather than at zero resistance.

Practise Current Electricity

1,052 free Current Electricity MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.

Exams that ask Physics questions like this

Physics is on 13 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.

Related questions