A resistor connected to a 12V battery draws a current of 2A. The energy dispatched in the resistor in 5 minutes is ___.
A
3,600J
B
6,000J
C
7,200J
D
14,400J
Verified Correct Answer: C.
Physical Principles & Numerical Solution
Power drawn by the resistor = IV = (2)(3) = 24W = 24J/s
Energy dissipated = power \times time = (24)(5)(60) = 7200J
Source: Myschool Past Questions Archive (Record #47763)