The current in a lamp is 0.5 amps when plugged into a standard 110 V wall outlet. What is the resistance of the lamp when it is plugged into the standard wall outlet? *

According to ohm's law, current flowing through a conductor is directly proportional to the voltage over resistance.

Mathematically,       I =

where,     I = current

              V = voltage

               R = resistance

It is given that value of voltage is 120 V and current is 1.5 ampere. Therefore, calculate the resistance as follows.

                           I =

or,                         R =

                               =

                               = 80 volts per ampere

                              = 80 ohms

Hence, resistance of the lamp is 80 ohms.