Question

The energy dissipated by a resistor is $10\text{mJ}$ in $1\text{s}$ when an electric current of $2\text{mA}$ flows through it. The resistance is $\left(\text{in}\Omega \right)$
. (Round off to the Nearest Integer)

Answer 1

Heat dissipated through resistor is given as:$$H=i^{2}Rt$$ Substituting the values,
$10\times {10}^{-3}={(2\times {10}^{-3})}^2\times R\times 1$
$\Rightarrow R=10\times \frac{{10}^3}{4}$
$\therefore R=2500\Omega$