QUIZ 1 NMK20203

...................... impurity atoms are added to increase the number of conduction band electrons in silicon.

• Trivalent

• Valence

• Pentavalent

• Holes

Majority carrier in P-type semiconductor is............

• electrons

• valence

• holes

• nucleus

The nucleus of an atom is comprise of .......................

• electrons and protons

• neutron and protons

• electrons and neutron

• electron only

A pentavalent impurity is added to silicon to create ......

• an n-type semiconductor

• a depletion region

• a barrier potential

• a p-type semiconductor

A negative ion is formed in depletion region when ........

• two atoms bond together

• a valence electron breaks away from the atom

• p region loses holes

• free electron diffuse across the junction

The depletion region consists of ..........................

• no majority carriers

• minority carriers

• positive and negative ions

• no minority carriers

Forward bias .......................... the depletion region and produce a voltage drop across the pn junction.

• widen

• maintain

• narrows

• change

If the forward current in a diode is increased, the diode voltage will ..........................

• decrease

• increase

• maintain

• deteriorate

If the barrier potential of a diode is exceeded, the forward current will ................................

• increase

• decrease

• maintain

• deteriorate

In the forward bias arrangement of a p-n junction diode,............

• the direction of current is from n-end to p-end in the diode

• the p-end is connected to the positive terminal of the battery

• the n-end is connected to the positive terminal of the battery

• the p-end is connected to the negative terminal of the battery