Physics

Electric current is the flow of electric charge across a surface, point, or region.

The semiconductor device produced by p-type and n-type semiconductors is called a diode.

Specific resistance is a property of a material defining how strongly can the material oppose the flow of electrode current. At constant temperature, the resistance of a conductor of unit cross-sectional area and length is called specific resistance of the conducting element at that temperature.

ECG is the abbreviated form of the word electrocardiogram. ECG is a diagnostic procedure that is routinely used to assess the electrical and muscular functions of the heart.

A diode is an electrical device allowing current to move through it is one direction with the far greater case than in the other.

For an electromotive source, due to its own internal resistance, some of the voltage is reduced. This is known as lost voltage.

At a fixed temperature, the current flowing through a conductor is directly proportional to the potential difference across its two ends.

The power to convert electric energy into any other energy in electric appliances per second is called the electric power.