Question

Two batteries of emf $\varepsilon_{1}$ and $\varepsilon_{2}\left(\varepsilon_{2}>\varepsilon_{1}\right)$i) and internal resistances $r_1$ and $r_2$ respectively are connected in parallel as shown in figure

• A. The equivalent emf $\varepsilon_{eq}$ of the two cells is between $\varepsilon_{1}$ and $\varepsilon_{2}$, i.e. $\varepsilon_{1} < \varepsilon_{eq} < \varepsilon_{2}$.
• B. The equivalent emf $\varepsilon_{eq}$ is smaller than $\varepsilon_{1}$
• C. The $\varepsilon_{eq}$ is given by $\varepsilon_{eq} = \varepsilon_{1} +\varepsilon_{2}$ always
• D. $\varepsilon_{eq}$ is independent of internal resistances $r_1$ and $r_2$

Answer 1

Answer: (A)

The equivalent emf $\varepsilon_{eq}$ of the two cells is between $\varepsilon_{1}$ and $\varepsilon_{2}$, i.e. $\varepsilon_{1} < \varepsilon_{eq} < \varepsilon_{2}$.

Answer 2

A. The equivalent emf $\varepsilon_{ eq }$ of the two cells is between $\varepsilon_{1}$ and $\varepsilon_{2}$,