Electronic Devices (Introduction)

Electronic Devices (Introduction)

Multiple Choice

How many valence electrons does a semiconductor have?

• 3

• 4

• 5

• 6

Multiple Choice

What is the most widely used semi-conductive material?

• Germanium

• Gallium arsenide

• Silicon

• Cadmium Selenide.

Multiple Choice

The following is true about intrinsic semiconductor except

• undoped semiconductor

• i-type semiconductor

• pure semiconductor

• has dopant

Multiple Choice

Materials in which atoms are placed in a highly ordered structure are called

• Amorphous

• Crystalline

Multiple Choice

The doped material is

• intrinsic semiconductor

• extrinsic semiconductor.

Multiple Choice

Donor atom is

• pentavalent atom.

• acceptor atom.

Multiple Choice

A trivalent impurity is added to a pure semiconductor in a small amount, and as a result, a large number of holes are created in it. It is referred to

• P-Type Semiconductor

• n-Type Semiconductor

Multiple Select

Choose the true statements about about diffusion

• The charge density of the P-type along the junction is filled with negatively charged acceptor ions

• The charge density of the P-type along the junction is filled with positively charged donor ions

• the charge density of the N-type along the junction becomes positive.

• the charge density of the N-type along the junction becomes negative.

Multiple Select

Choose the true statements about about depletion region

• the N-side of it is positively charged

• the P-side of it is negatively charged.

• the N-side of it is negatively charged

• the P-side of it is positively charged.

Multiple Select

Choose the true statement about about barrier potential

• free electrons near the junction diffuse across the junction into the P region and combine with holes.

• Filling a hole makes a negative ion and leaves behind a positive ion on the N side.

• As electrons diffuse across the junction a point is reached where the negative charge repels any further diffusion of electrons. The depletion region now acts as a Barrier.

• free electrons near the junction diffuse across the junction into the N region and combine with holes.