# Question #c3b78

##### 1 Answer

Jan 29, 2016

#### Answer:

I would go for B) zero to

#### Explanation:

The variable resistor can be set (I think) starting at zero up to

At zero (basically the resistor becomes a simple wire) the voltage drop between points P and Q is zero (or the difference in potential between them is zero).

When at

to find the current in the circuit comprising the series of the two resistors:

and again to find the voltage drop across the variable resistor (at