Ratio of thermal energy released in two resistor $R$ and $3 R$ connected in parallel in an electric circuit is :

If a wire of resistance $20\,\Omega $ is covered with ice and a voltage of $210\, V$ is applied across the wire, then the rate of melting of ice is .................. $g/s$

A battery is charged at a potential of $15\, V$ for $8$ hours when the current flowing is $10\, A$. The battery on discharge supplies a current of $5\, A$ for $15$ hours. The mean terminal voltage during discharge is $14\, V$. The "Watt-hour" efficiency of the battery is .............. $\%$

If the current through a resistor in a circuit increases by $3 \%$, then the power dissipated by the resistor

Assertion : Long distance power transmission is done at high voltage.

Reason : At high voltage supply power losses are less.

In the following circuit, bulb rated as $1.5\, V$, $0.45\, W$. If bulbs glows with full intensity then what will be the equivalent resistance between $X$ and $Y$ ............. $\Omega$