What is a Zener diode?

Zener diode is an important diode. It is used extensively electronic device. Many of electronic circuit require D.C. voltage to operate. But it is not always possible normally. The voltage can be stable if Zener diode is used. It gives ...

p-n junction diode

When an n type semiconductor is joined to a p type semiconductor such that the crystal structure remains continuous at the boundary, the junction is called the p-n junction and the resulting combination is called a p-n junction diode or ...

What is n-type semiconductor?

A pentavalent impurity like arsenic, phosphorous is added with pure semiconductor like silicon or germanium for making n type semiconductor. The most important requirement is that the size of the impurity atom should be nearly equal to the size of ...

p type semiconductor

Trivalent element like gallium or aluminum is mixed with pure semiconductor like silicon or germanium to make p type semiconductor. Three valence electrons of aluminum make bond with neighboring electrons of silicon. Here three covalent bonds are made. But the ...

Electrical conductivity

The substances by which electricity or charges flow is called medium. It is classified into three types are (i) Conductor, (ii) Semiconductor (iii) Non conductor (i) Conductor: conductor is this substance in which electricity or charges can flow easily. Examples ...

Semiconductor

Three types substances are mainly we have viz solid, liquid and gases. Solids are classified in three types according to electrical conductivities. This substances through electricity or charges can pass easily facing no prevention is called conductors. Conductors of electricity ...

Types of electricity

There are two types of electricity viz Current electricity Static electricity Current electricity:  Electricity means charge. When the charge does not remain confined in one place, it moves one place to another place is called current electricity. We use current ...

What is electromotive force?

 We use radio, television, refrigerators tube light etc in our home appliance. To operate these appliances we need electric energy. There are many kinds of sources of electrical energy like generator, electric cell or battery. Let us consider a torch ...