Question
What formula is used to calculate resistance in a circuit?
Answer Options
- A) R = E x I
- B) R = E / I
- C) R = E + I
- D) R = E – I
Correct Answer: B
Explanation
This is the third and final form of Ohm’s Law. To calculate resistance (\text{R}) in a circuit, you divide the voltage (\text{E}) by the current (\text{I}): R = E / I.
This formula allows you to determine the unknown resistance of a component or load if you can measure the voltage applied across it and the current flowing into it.
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