Confused: potential difference vs. voltage drop?

[xxavenue]

Homework Statement

In Fig. 28-5a calculate the potential difference across R2, assuming = 14 V, R1 = 6.0 , R2 = 3.0 , and R3 = 2.0.

(image isn't working online, but it's a simple circuit- all the resistors are in series)

Homework Equations

V = IR

The Attempt at a Solution

Req = R1 + R2 + R3 = 11 ohms
I = V/Req = 14/11 = 1.27 A
V = IR1 = 1.27 * 6 = 7.62 V
V = IR2 = 1.27 * 3 = 3.81 V

So I know the voltage drop across R1 and R2, but I'm confused- what's the difference between calculated voltage drop and the potential difference across the resistor?

Many thanks.

 

[Dick]

I think 'voltage drop' and 'potential difference' mean exactly the same thing. You seem to be doing just fine.