Question

A battery is charged at a potential of $\begin{array}{*{20}{l}} {15\,\,V} \end{array}$ in ${\rm{8}}\,\,{\rm{hours}}$ when the current flowing is $10\,\,A$. The battery on discharge supplies a current of $5\,\,A$ for ${\rm{15}}\,\,{\rm{hours}}$. The mean terminal voltage during discharge is $\begin{array}{*{20}{l}} {14\,\,V} \end{array}$. The $''Watt - hour''$ efficiency of battery is

Accepted Answer

$\begin{array}{*{20}{l}} {{\rm{87}}{\rm{.5}}\,\,{\rm{\% }}} \end{array}$

Answer

$\begin{array}{*{20}{l}} {{\rm{80}}\,\,{\rm{\% }}} \end{array}$

Answer

$\begin{array}{*{20}{l}} {{\rm{90}}\,\,{\rm{\% }}} \end{array}$

Answer

$\begin{array}{*{20}{l}} {{\rm{82}}{\rm{.5}}\,\,{\rm{\% }}} \end{array}$

JEE PHYSICS MCQ: CURRENT ELECTRICITY

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