# Tagged: Work done

## Potential energy, Kinetic energy and Law of conservation of mechanical energy

At the maximum height of a projectile, its mechanical energy is equal to its potential energy only because the mechanical energy of an object is the sum of potential and kinetic energies of the...

## Kirchhoff’s first law, Kirchhoff’s second law and how to solve problems of Kirchhoff’s laws

Some electric circuits consist of many branches and are too complicated to be managed by Ohm’s law because the electric current passing through them is different in each branch, For such cases, a German...

## Ohm’s Law for the closed circuit, Relation between emf (VB) of an electric cell & voltage across its poles

The emf of an electric cell (battery – source) is the total work done inside and outside the cell to transfer electric charges in the electric circuit, If we denote the emf of the...

## Electrical current, Potential difference, Electric resistance and Ohm’s law

The electric current is a flow of electric charges through a conducting material, The electric current flows from the positive pole to the negative pole outside the source & it is called the conventional...