A battery of emf E and internal resistance r is connected to a variable resistor R as shown in figure. Which one of the following is true ?

A battery of e.m.f. E and internal resistance r is connected to a variable resistor R as shown here. Which one of the following is true

A battery of e.m.f. E and internal resistance r is connected to variable resistance R as shown here. Which one of the following is true?

A battery of e mf 10 V and internal resistance 3Omega is connected to a resistor as shown in the figure. If the current in the circuit is 0.5 A . then the resistance of the resistor will be

A cell of emf E and internal resistance r is connected to a variable external resistor R. the graph which gives the terminal voltage of cell V with respect to R is

.A cell of emf E and internal resistance r is connected across a variable resistor. Plot a graph showing variation of terminal voltage V of cell versus the current.

A battery of emf E and internal resistance 'r' is connected to an external resistance 'R', the condition for maximum power transfer is