The heat evolved or absorbed at the junction when an electric current passes through the junction of two different metals is known as which effect?

The electrochemical equivalent of a substance is numerically equal to the mass of the substance deposited if a current $I$ flows through the electrolyte for $0.25\,s$. The value of $I$ is ................ $A$.

Ten $60 \, W, 220 \, V$ bulbs are connected in series to a $220 \, V$ supply. The power consumed in the circuit is ......... $W$.

Three identical resistors are connected in series,and the total power consumed is $10 \, W$. If they are connected in parallel,what will be the total power consumed in $W$?

$A$ cell of emf $E$ has an internal resistance $r$ and is connected to a rheostat. When the resistance $R$ of the rheostat is changed,which is the correct graph of the potential difference $V$ across it?

The total power dissipated in the circuit shown here is ............. $W$.