Two identical batteries, each having emf of 1.8 V and of equal internal resistances are connected as shown in the figure. Potential difference between A and B will be equal to (Ignore the resistance of lead wires)

Seven identical cells each of e.m.f. E and internal resistance r are connected as shown . The potential difference between A and B is

Seven identical cells each of e.m.f. E and internal resistance r are connected as shown . The potential difference between A and B is

Two non-ideal batteries have e.m.f 2V and 8V respectively and internal resistance 1 Omega and 2 Omega respectively as shown in the figure. If the potential difference between a and b is zero then the resistance R has a value

Two non-ideal batteries have e.m.f 2V and 8V respective ly and internal resistance 1 Omega and 2 Omega respectively as shown in the figure. If the potential difference between a and b is zero then the resistance R has a value

Two batteries of difference emf's and internal resistance are connected in parallel to one another.

N identical current sources each of emf E and internal resistance r are connected to form a closed loop as shown in figure. The potential difference between points A and B which divides the circuit into n and (N-n) units is

N identical current sources each of emf E and internal resistance r are connected to form a closed loop as shown in figure. The potential difference between points A and B which divides the circuit into n and (N-n) units is

Two batteries of different emfs and different internal resistances are connected as shown. The voltage across AB in volts is. .