Grab the "wiper" of the potentiometer (the horizontal arrow at right of resistor) and slide it up and down to change the values of R1 and R2.
The input voltage is V1 = 10 Volts.
Total Resistance of Potentiometer = Rpot = Ohms.
0 10
Call the resistance above the slider R1 = Ohms, and the resistance below
is R2 = Ohms.
These two resistance form a voltage divider, with output voltage $V2 = V1 \frac {R2}{R_{pot}} = V1 \frac {R2}{R1
+
R2}$ = Volts.
The current is $I=\frac{V1}{R_{pot}}=\frac{V1}{R1+R2}=$ Amps