List of top Physics Questions on Electric Circuit asked in CBSE CLASS XII

A cell of emf \( E \) and internal resistance \( r \) is connected across a resistor of variable resistance \( R \). Show graphically the variation of
(a) the terminal voltage across the cell,
(b) the current supplied by the cell,
with \( R \) as it is increased from 0 to the maximum value.
Three cells A, B, and C of EMFs 2 V, 3 V, and 5 V respectively are connected in parallel to each other. Their internal resistances are 5 \( \Omega \), 5 \( \Omega \), and 1 \( \Omega \) respectively. Calculate the currents flowing through the cells A, B, and C.