A battery has an emf $\varepsilon = 12 \mathrm {~V}$ and an internal resistance $r = 2.0 \Omega$, as shown in the figure. When a $3.0 - \Omega$ 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) $27 \mathrm {~W}$.
B) $29 \mathrm {~W}$.
C) $24 \mathrm {~W}$.
D) $32 \mathrm {~W}$.
E) $34 \mathrm {~W}$.

Question

A battery has an emf $\varepsilon = 12 \mathrm {~V}$ and an internal resistance $r = 2.0 \Omega$, as shown in the figure. When a $3.0 - \Omega$ 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) $27 \mathrm {~W}$. 
B) $29 \mathrm {~W}$. 
C) $24 \mathrm {~W}$. 
D) $32 \mathrm {~W}$. 
E) $34 \mathrm {~W}$.

Quizplus · Accepted Answer

The Answer of A battery has an emf $\varepsilon = 12 \mathrm {~V}$ and an internal resistance $r = 2.0 \Omega$, as shown in the figure. When a $3.0 - \Omega$ 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) $27 \mathrm {~W}$. 
B) $29 \mathrm {~W}$. 
C) $24 \mathrm {~W}$. 
D) $32 \mathrm {~W}$. 
E) $34 \mathrm {~W}$.

A Battery Has an Emf ε=12 V\varepsilon = 12 \mathrm {~V}ε=12 V And an Internal Resistance

A Battery Has an Emf $\varepsilon = 12 \mathrm {~V}$ And an Internal Resistance