Electric transformer uses, structure, efficiency and How it works
The transformer is a device used to step up or to step down an AC voltage, It is used in some home appliances such as bells and fridges, It is used to decrease the...
Tagged: Electric circuits
Direct current voltmeter, Ohmmeter uses, importance and structure
Analog measuring instruments depend on the torque that is generated in a moving coil carrying current in a magnetic field, They depend on a pointer to give the value of the quantity, such as...
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...