A simple circuit has a total resistance of 30 Ω.If a 2.0-A current is maintained in this circuit,how much energy is dissipated in this circuit in 4.0 seconds?
A)24 J
B)4.8 J
C)48 J
D)480 J
E)6.0 J

Question

Quizplus · Accepted Answer

The energy dissipated in a circuit can be calculated using the formula:

E = I^2Rt

Where E is energy in Joules, I is current in Amperes, R is resistance in Ohms and t is time in seconds.

In this case, we are given that the resistance is 30 Ω and the current is 2.0 A. So,

E = (2.0 A)^2 x 30 Ω x 4.0 s = 480 J

Therefore, the energy dissipated in this circuit in 4.0 seconds is 480 J. Hence, the correct answer is D.

A Simple Circuit Has a Total Resistance of 30 Ω