Question

Relation between emf (E) and potential difference (V) of an ideal cell is ​

Answer 1

Answer:

To drive a current through a ideal cell from its positive terminal to its negative terminal requires thera to be an external voltage source which exceeds the emf ot the cell E by an infinitesimal amount....... So the total applied potential difference across the cell must be V=E+IR.

Answer 2

Answer:

Electromotive force is the amount of energy given to coulomb of change and potential difference is the amount of energy utilized by coulomb charge.

Explanation:

Electromotive Force (EMF) :

• EMF, also referred to as electromotive force, is the energy source used to charge a battery cell.
• It produces and sustains a voltage in the active cell by giving each unit of Coulomb charge energy measured in Joules.

Potential difference(v)

• The force that propels an electric charge forward called voltage.
• Between two connections, there is a potential difference where one link gathers more electrons than the other.

• The definition of voltage is potential energy per charge.

Difference between EMF and Voltage:

1. Emf  : Emf is the voltage developed between two terminal of a batter  

              or  a source

Voltage : Voltage is the potential difference developed between the

                   two electrode potential of a battery

2.Emf     : Emf is independent of the resistance of the electrical circuit.

Voltage : It is directly proportional to the resistance between the two  

                terminal

3. Emf    : Formula used: e = I(R + r)

 Voltage: Formula used: V = IR

4. Emf  :  Emf of any circuit can be measured by using a potentiometer

Voltage : Voltage of an circuit is measured by voltmeter.

5. Emf    : Emf is defined by non coulomb force or non electric force

                operation

Voltage : The voltage is defined by coulomb force or electric force

                operation.

#SPJ3