WBCS.LIVE practice question

A battery consists of 10 cells, each of emf 1V. If 2 cells are wrongly connected, the emf of the battery becomes

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 8V
  2. 10V
  3. 6V
  4. 12V

Correct answer and explanation

Correct answer: 6V

Explanation: āœ… Correct Answer: C. 6V šŸ“š Explanation: In a battery of 10 cells, if 2 cells are connected the wrong way, they will cancel out the voltage of 2 'good' cells. Therefore, the net voltage will be reduced by the strength of 4 cells. Calculation: 10V - (2 x 2V) = 6V. This results in the battery behaving as if it only has 6 effective cells. This is a common physics problem regarding series electrical connections.