Question

Please help on this one?

Answer 1

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

Step-by-step explanation:

I =
`(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
`(E)/(R)`

Since you have multiplied
`(E)/(R)` by 0.25,

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