ELEKTREUM Prelims Synchronize'21

A semiconductor is formed by __________ bonds.

• covalent

• elctrovalent

• ionic

• hydrogen

________________________is the most commonly used semiconductor material

• Germanium

• Carbon

• Silicon

• Sulphur

A semiconductor has generally __ valence electrons.

• 2

• 3

• 4

• 6

1. When a pure semiconductor is heated, its resistance ______________.

• goes up

• goes down

• fluctuates

• Can't say

1. When a pentavalent impurity is added to a pure semiconductor, it becomes _______.

• an insulator

• an intrinsic conductor

• p-type semiconductor

• n-type semiconductor

Norton resistance is found by?

• Shorting all voltage sources

• Opening all current sources

• Shorting all voltage sources and opening all current sources

• Opening all voltage sources and shorting all current sources

Norton’s theorem is true for __________

• Linear networks

• Non-Linear networks

• Both linear networks and nonlinear networks

• Neither linear networks nor non-linear networks

The Thevenin voltage is the__________

• Open circuit voltage

• Short circuit voltage

• Open circuit and short circuit voltage

• Neither open circuit nor short circuit voltage

In Thevenin’s theorem Vth is __________

• Sum of two voltage sources

• A single voltage source

• Infinite voltage sources

• 0

A JFET has three terminals, namely …………

• cathode, anode, grid

• emitter, base, collector

• source, gate, drain

• none of the above