Question

An electric current of 5 ampere flows through a resistance of 423.5 ohms.If the heat generated is equal to 7500 J. Find the time for which the current flows through the circuit​

Answer 1

Answer:

Explanation:

The heat energy generated is given by the formula I²RT where I = current, R= resistance and T= time

Given,

heat energy = 7500 J

resistance = 423.5 Ω

current = 5 A

substituting,

7500 = 423.5 x 5² X T

7500 = 423.5 X 25 X T

7500 = 10587.5 X T

T = 7500/10587.5 =0.7 s