Electrical inverse relationship

Electrical inverse relationship

Secondary 2
TGM Original Questions

A wire’s resistance \(R\) ohms is inversely proportional to current \(I\) amperes. Its resistance is \(0.5\,\Omega\) at \(12\) A.

  1. Form an equation connecting \(R,I\).
  2. Find \(R\) at \(4\) A.
  3. Find \(I\) when \(R=3\,\Omega\).

Solution:

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Answer:(i) \(R=\frac6I\); (ii) \(1.5\,\Omega\); (iii) \(2\) A.

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