A battery has an emf ε = 12 V and an internal resistance r = 2.0 Ω,as shown in the figure.When a 3.0-Ω cable is connected across the battery terminals a and b,the rate at which chemical energy in the battery is depleted is closest to
A)24 W.
B)27 W.
C)29 W.
D)32 W.
E)34 W.

Question

A battery has an emf ε = 12 V and an internal resistance r = 2.0 Ω,as shown in the figure.When a 3.0-Ω cable is connected across the battery terminals a and b,the rate at which chemical energy in the battery is depleted is closest to 
A)24 W. 
B)27 W. 
C)29 W. 
D)32 W. 
E)34 W.

Quizplus · Accepted Answer

The Answer of A battery has an emf ε = 12 V and an internal resistance r = 2.0 Ω,as shown in the figure.When a 3.0-Ω cable is connected across the battery terminals a and b,the rate at which chemical energy in the battery is depleted is closest to 
A)24 W. 
B)27 W. 
C)29 W. 
D)32 W. 
E)34 W.

A Battery Has an Emf ε = 12 V and an Internal