Question

Write the definition of electromotive force of a cell and relate it to its internal resistance.​

Answer 1

Answer:

Definition. The potential difference across the poles of a cell when no current is being taken from it is called the electromotive force (EMF) of the cell. ... If the external resistance is R and the internal resistance is r, the total resistance of the circuit is R+r, so that the current that flows is E/(R+r).

Explanation:

Hope it helps you

Answer 2

Electromotive force

Explanation:

• EMF is voltage , which is measured in coulombs of charge.

• It's pressure developed or an electrical intensity from a electricity or a source.

• It's a tool which converts any sort of energy into electricity which is then measured with coulombs of charge.

EMF = I (R + r)

• Where I is that the current in amperes;
• R is that the resistance of load within the circuit in ohms;
• r is that the internal resistance in ohms;

EMF = E/ Q

Where E is that the energy in joules;

Q is that the charge in coulombs;

Internal Resistance (r) = (E – V)/I

• When there's current present within the device or the circuit and there’s a drop in source voltage or source battery is Internal Resistance. it's caused thanks to electrolytic material in batteries or other voltage sources.