Question

Write two differences between EMF and potential differences (PD).

Answer 1

EMF is the energy per unit charge exerted by an energy source. Potential difference is the energy released when the unit quantity of electricity passes from one point to another.

Complete step-by-step answer:
EMF –
The full form of EMF is Electromotive force.
The cause is the Electromagnetic Field.
It does not depend upon the resistance of the circuit.
Voltage developed by an electrical source is called electromotive force.

PD –
The full form of PD is a potential difference.
The result is PD.
The observed difference in voltage in any two points in an open circuit is called potential difference.
It solely depends on the resistance of the circuit.

PD: Electrical potential is a position-dependent quantity that expresses the amount of potential energy per unit of charge at a given site. If a Coulomb of charge (or any given amount of charge) has a fairly large amount of potential energy at a given location, that location is said to have a high electrical potential. Similarly, if a Coulomb of charge (or any given amount of charge) has a relatively small amount of potential energy at a given location, that location is said to have a low electrical potential.When we continue to apply our definitions of potential energy and electrical potential to circuits, we will continue to refer to the difference in electrical potential between two points.

EMF: Power is transformed from one type to another in the generator or battery as the unit operates on the electrical charge being transferred inside it. One terminal of the unit is positively charged, the other is negatively charged. The electromotive force is the work performed on the electrical charge unit, or the energy thus produced by the electrical charge unit. Electromotive force is the characteristic of any energy source capable of moving the electrical charge around the circuit. It is shortened to E in the universal metric system, but sometimes, more popularly, to emf.

Note: To get the right answer to this problem you just have to grab these things since everyone is almost the same even the work is same but there is little difference which gives them two different names. You just need to read and remember these terms and their differences.