Question

Please help on this one?

Answer 1

Answer:

The current in a resistor decreases by a factor of 4.

Explanation:

I = $\frac{E}{R}$

Where (I) is the current, (E) is the voltage and (R) is the resistance.

Decreasing the voltage by 4 gives;

I = 0.25$\frac{E}{R}$

Since you have multiplied $\frac{E}{R}$ by 0.25,

You have to multiply I by 0.25 so the current decreases by a factor of 4.