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← Electric Current and Its Effects
GK QUESTION#2952

For an ohmic conductor at unchanged temperature, resistance is doubled while potential difference is kept constant. What happens to the current?

  1. AHalveCorrect answer
  2. BDouble
  3. CBecome four times
  4. DRemain the same
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Answer

A. Halve

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Explanation

At constant potential difference and unchanged ohmic behaviour, I = V/R. Replacing R by 2R gives Inew = V/(2R) = I/2.

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