Question

A light bulb with a resistance of 24.80 ohms is connected to a 5V battery. Calculate the work done as current flows through the light bulb.

a) 0.10 J
b) 0.20 J
c) 0.30 J
d) 0.40 J

Answer 1

To calculate the work done as current flows through the light bulb, use the formula: Work done (J) = Current (A) × Voltage (V). Calculate the current using Ohm's Law: Current = Voltage / Resistance. Finally, calculate the work done by multiplying the current and voltage.

Step-by-step explanation:

To calculate the work done as current flows through the light bulb, we can use the formula:

Work done (J) = Current (A) × Voltage (V)

First, we need to calculate the current flowing through the bulb. Using Ohm's Law, we can determine the current:

Current = Voltage / Resistance

Current = 5V / 24.80 ohms = 0.2016 A

Now we can calculate the work done:

Work done = 0.2016 A × 5V = 1.008 J

Therefore, the correct answer is 1.008 J. Option d) 0.40 J is not the correct answer.