Question

Case study $\left(1\right)$

A car battery with a $12\text{V}$ of emf and an internal resistance of $0.04\Omega$ is being charged with a current of $50\text{A}.$

$\left(iii\right)$The rate of energy conversion from electrical to chemical is

• A. $100\text{W}$
• B. $500\text{W}$
• C. $600\text{W}$
• D. $700\text{W}$

Answer 1

The correct option is C $600\text{W}$

The rate of energy conversion from electrical to chemical is

= Total energy for charging - Energy dissipated as heat

$=VI-H=(14\times 50)-100$

Here, $[H=100\text{W};V=14\text{V}]$

$=700-100=600\text{W}$

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Hence, $\left(C\right)$ is the correct answer.