Question

If doubling the voltage across a resistor doubles the current through the resistor then

• A. the resistor value decreased.
• B. the resistor value increased.
• C. the resistor value did not change.
• D. it is impossible to determine the change in the resistor value.

Answer 1

The correct option is C the resistor value did not change.

As $R=\frac{V}{I}$

Now voltage = $2V$ and current = $2I$

So now resistance = $\frac{2V}{2I}=\frac{V}{I}=R$