Question

Four cells of identical emf $E$ and internal resistance $r$ are connected is series to a variable resistor. The following graph shows the variation of terminal voltage of the combination with current. The emf of each cell used is

• A. $1.4V$
• B. $5.6V$
• C. $2V$
• D. $1V$

Answer 1

Answer: (B)

$5.6V$