The magnetic field due to current in a circular loop and a solenoid
The magnetic flux lines emerge from the North pole to the South pole outside the coil, A circular loop carrying an electric current is like a magnet in the form of a disk has...
Category: Physics
Magnetic effect of the electric current and Magnetic flux density due to current in two parallel wires
In 1819, a Danish physicist (Hans Oersted) brought a small compass near a wire carrying an electric current and parallel to it, He noticed that the compass needle deflected and when he turned 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 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 battery by...