A light bulb in a battery powered desk lamp has a current of 0.042 A and is connected to a 9.2 V battery. What is the resistance in the desk lamp?
Answer: 219 Ohms, C
Explanation:
To find the resistance, you can use Ohm's Law:
[tex]V = IR[/tex]
Where V is the voltage, I is the current, and R is the resistance.
[tex]9.2 = 0.042R\\\\\frac{9.2}{0.042} = R[/tex]
Solving for R gives us around 219 Ω.