A reversible galvanic cell is connected to an external battery. If the EMF of the battery is less than EMF of the galvanic cell, current

The EMF of a galvanic cell is measured by

The e.m.f of the following galvanic cell:

The e.m.f of the following galvanic cells:

The e.m.f of the following galvanic cells:

cells each of emf e and internal resistance r are joined in series to form a row and such rows are connected in parallel to form a battery of N = mn cells. If this battery is connected to an external resistance R . What is the emf of this battery and how much is its internal resistance ?

n. cells, each of emf .e. and internal resistance .r. are joined in series to form a row. .m. such rows are connected in parallel to form a battery of N = mn cells. This battery is connected to an external resistance .R.. (i) What is the emf of this battery and how much is its internal resistance ? Show that current .l. flowing through the external resistance .R. is given by- I=(Ne)/(mR+nr)

The emf of a galvanic cell is positive when free energy change of reaction is