Question

A resistor is connected across the terminals of a 3.00-V battery, which delivers 2.80 105 J of energy to the resistor in 5 hours. What is the resistance of the resistor?

Answer 1

here,

let the resistance is R

Voltage, V = 3 V

time , t = 5 hour = 5 * 3600 s

total energy = V^2/R * time

2.8 *10^5 = 3^2/R * 5 * 3600

solving for R

R = 0.58 Ohm

the resistance of the resistor is 0.58 Ohm