Question

An incandescent light bulb has a resistance of 240 ohm when lighted. What is the current when connected to a 120 V source?

Answer 1

0.5 Amperes

Step-by-step explanation

Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.

so

`Current=(voltage)/(resistance)`

so

Step 1

a) let

`\begin{gathered} Resistnace\text{ =}240\text{ ohm} \\ voltage=\text{ 120 V} \end{gathered}`

b) now, replace in the formula and calculate

`\begin{gathered} Current=(voltage)/(resistance) \\ I=\frac{120\text{ V}}{240\text{ ohm}} \\ I=0.5\text{ Amperes} \end{gathered}`

therefore, the answer is

0.5 Amperes

I hope this helps you