Electric Circuit: Calculating Resistance of a Lamp
What is the resistance of a lamp that draws a current of 0.50 A when connected to a 120 V source?
The resistance of the lamp can be calculated using Ohm's law formula. Let's solve for the resistance:
Ohm's law states that the voltage (V) across a resistor is equal to the current (I) flowing through it multiplied by the resistance (R) of the resistor. The formula is given by:
V = IR
We can rearrange the formula to solve for resistance:
R = V / I
Substitute the given values into the formula:
R = 120 V / 0.50 A = 240 Ω
Therefore, the resistance of the lamp is 240 ohms.