Four idential cells each having e.m.f. E, internal resistance r are connected as shown in figure. Find the potential difference between: (i) A and B (ii) A and C

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 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)

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

Four cells each of emf E and internal resistance r are connected in series to form a loop ABCD. Find potential difference across (1) AB, (2) AC

A cell of emf E having an internal resistance R varies with R as shown in figure by the curve

Idnetical resistor each of resistance r are connected as shown in figure. Calculate equivalent resistance between A and E.

If n cells each of emf E and internal resistance rare connected in parallel, then the total emf and internal resistances will be

A battery of e.m.f. 10 V is connected to resistance as shown in figure. The potential difference V_(A) - V_(B) between the point A and B is

Assertion:- To cells of unequal emf E_(1) and E_(2) having internal resistances r_(1) and r_(3) are connected as shown in figure. Then the potential difference across any cell cannot be zero. Reason:- If two cells having nonzero internal resistance and unequal emf are connected across each other as shown, then the current in the circuit cannot be zero.