Intrinsic Semiconductor — Practice Quiz

Question 1

In an intrinsic semiconductor at T > 0 K:

Accepted Answer

n = p = n_i

Answer

n > p

Answer

n < p

Answer

n = 0

Question 2

Intrinsic carrier density at room temperature in Si:

Accepted Answer

~10¹⁶/m³

Answer

~10²⁸/m³

Answer

~10¹⁰/m³

Answer

Zero

Question 3

If temperature doubles, intrinsic conductivity:

Accepted Answer

Increases (exponentially via exp(−E_g/2kT))

Answer

Doubles

Answer

Halves

Answer

Stays the same

Question 4

Mass-action law n·p = n_i² holds:

Accepted Answer

For ALL semiconductors at equilibrium

Answer

Only for intrinsic

Answer

Only for n-type

Answer

Only for p-type

Question 5

At absolute zero, an intrinsic semiconductor behaves as:

Accepted Answer

Insulator

Answer

Conductor

Answer

Semiconductor as usual

Answer

Superconductor