Question

write formula of EMF for parallel combination of cells​

Answer 1

Answer:

Ohm's law: V=IR where V is the EMF of the cell, I is the current in the circuit which has resistance R .

please mark as brainlist

Answer 2

The EMF or electromotive force is the energy supplied by a battery or a cell per coulomb (Q) of charge passing through it. The magnitude of emf is equal to V (potential difference) across the cell terminals when there is no current flowing through the circuit.

e = E/Q

Where, e = emf or electromotive force (V), W = Energy (Joules), and Q denotes charge (Coulombs). Both emf (electromotive force) and pd (potential difference) are measured in V (Volts)

Electromotive force (emf) formula can also be written as,

e = IR + Ir  or, e = V + Ir

Where,

e is the electromotive force (Volts),

I = current (A),

R = Load resistance,

r is the internal resistance of cell measured in ohms.

Difference between EMF and Potential Difference?

The amount of energy (any form) changed into energy (electrical) per coulomb of charge is termed as EMF whereas the potential difference is the amount of energy (electrical) that is changed into other forms of energy per coulomb of charge. Cell, solar cell, battery, generator, thermocouple, dynamo, etc are examples of sources of emf.