$\begin {array} {1 1} (A)\;Zero\: when\: it\: is\: short \: circuited \\ (B)\; Less\: than\: its\: emf\: when\: current\: flows\: from \: negative\: to \: positive\; terminal\: inside\: the\: battery \\ (C)\;Greater \: than\: its\: emf\: when\: current\: flows\: from\: positive\: to\: negative\: terminal\: inside \: the\: battery \\ (D)\;Zero\: when\: no\: current\: is\: drawn\: from \: it \end {array}$