A piece of wire of resistance R is cut into 5 equal parts. These parts are then connected in parallel. If the equivalent resistance of the combination is R, then the ratio R/R is

Asked In Exam: BPSC TRE 3.0

Options

  • A. 1/25
  • B. 1/5
  • C. 25
  • D. More than one of the above
  • E. None of the above

Correct Answer (Detailed Explanation is Below)

C. 25

Detailed Explanation

Each part has resistance R/5. Five equal resistors R/5 in parallel give equivalent resistance R/25. Hence R/R = 25.

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BPSC TRE 4 General Science practice set 1

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