Question

How much current is flowing through a 20 ohm resistor when a potential difference of 2 volt is applied across its end?

Answer 1

V=RI
I=V\R
I=2\20
I=0.1 ampere

Answer 2

Resistance (R)=20ohm
Potential difference (v)=2volt
Resistance=
potential difference/current
Current=2/20
Current=1/10
Current=0.1ampere