The efficiency of a cell when connected to a resistance `R` is `60 %`. What will be its efficiency if the external resistance is increased by six times?

The internal resistance of a cell of emf E is r, and external resistance is R. What is the potential about the external Resistance

A cell of e.m.f. E is connected with an external resistance R , then p.d. across cell is V . The internal resistance of cell will be

A 50 V battery is supplying current of 10 A when connected to a resistor. If the efficiency of the battery at this current is 25%, then the internal resistance of the battery is

A 50 V battery is supplying current of 10 A when connected to a resistor. If the efficiency of the battery at this current is 25%, then the internal resistance of the battery is

An total resistance R is connected to a cell of internal resistance r the maximum current flows in the external resistance, when

The electric power transferred by a cell to an external resistance is maximum when the external resistance is equal to (r internal resistance)

5 electric cells are connected in series .Emf of each cell is 1.5 V and internal resistance is 0.1 Omega .When this combination of cells is connected with an external circuit of resistance 4 Omega, what will be the current through that resistance? What resistance should be connected instead of 4 Omega so that the current will be halved?

A cell of emf E and internal resistance ® is connected across an external resistance, R. The cell shall drive maximum current through the external resistance R only if

The electric power transferred by a cell to an external resistance is maximum when the external resistance is equal to ...(r internal resistance)