Heat produced in a wire of resistance $R$ due to current flowing at constant potential difference is proportional to
$\frac{1}{{{R^2}}}$
$\frac{1}{R}$
$R$
${R^2}$
Two wires have resistance of $2$ $\Omega$ and $4$ $\Omega$ connected to same voltage, ratio of heat dissipated at resistance is
There are two electric bulbs of $40\, W$ and $100\, W$. Which one will be brighter when first connected in series and then in parallel,
The ratio of heat dissipated per second through the resistance $5 \Omega$ and $10 \Omega$ in the circuit given below is: :
In the circuit shown in figure, the power which is dissipated as heat in the $6\,\Omega$ resistor is $6\,W$. What is the value of resistance $R$ in the circuit?................... $\Omega$
Assertion : Long distance power transmission is done at high voltage.
Reason : At high voltage supply power losses are less.