Basic Electronics

A crystal diode has

• one pn junction

• two pn junctions

• three pn junctions

• none of the above

If the arrow of crystal diode symbol is positive w.r.t. bar, then diode is ………….. biased.

• forward

• reverse

• either forward or reverse

• none of the above

The forward voltage drop across a silicon diode is about …

• 2.5V

• 3V

• 10V

• 0.7V

A crystal diode is used as ……

• amplifier

• rectifier

• oscillator

• voltage regulator

An ideal crystal diode is one which behaves as a perfect ……….. when forward biased.

• conductor

• insulator

• resistance material

• none of the above

When the crystal current diode current is large, the bias is ……

• forward

• inverse

• poor

• reverse

A crystal diode is a …………… device

• non-linear

• linear

• bilateral

• none of the above

A semiconductor is formed by ……… bonds.

• covalent

• electrovalent

• co-ordinate

• none of the above

The most commonly used semiconductor is …

• germanium

• silicon

• carbon

• sulphur

When a pentavalent impurity is added to a pure semiconductor, it becomes …

• insulator

• intrinsic semiconductor

• p-type semiconductor

• n-type semiconductor