The current running through a circuit is 10 amps from a 5 V battery. Calculate the resistance.
a
2 Ohms
b
50 Ohms
c
0.5 Ohms
d
Not enough information
c) 0.5 Ohms
Use Ohm's Law: resistance = voltage / current
r = 5 V / 10 A
r = 0.5 Ohms