Semiconductor Physics Quiz

Which factor determines the direction of the Hall voltage in a semiconductor?

• Electric field direction

• Magnetic field direction

• Current direction

• Temperature gradient

What is the primary use of the Hall effect in semiconductors?

• Measuring voltage

• Determining carrier mobility

• Calculating resistance

• Amplifying signal

How does carrier recombination affect the conductivity of a semiconductor?

• Increases conductivity

• Decreases conductivity

• Has no effect

• Creates more free carriers

Which of the following is a consequence of excessive carrier generation?

• Increased band gap

• Decreased mobility

• Increased recombination rate

• Reduced thermal energy

Which carrier concentration remains nearly constant in an intrinsic semiconductor at equilibrium?

• Electron concentration only

• Hole concentration only

• Product of electron and hole concentrations

• Sum of electron and hole concentrations

In an n-type semiconductor, which carrier is the majority carrier?

• Holes

• Electrons

• Ions

• Photons

What is the relationship between the intrinsic carrier concentration and temperature?

• It decreases with temperature

• It remains constant

• It increases exponentially with temperature

• It fluctuates randomly

What does the Fermi level represent in a semiconductor?

• Energy at which electrons move freely

• Average energy of holes

• Probability of occupancy being 0.5

• Top of valence band

What is observed in the energy band diagram of an insulator?

• Overlapping valence and conduction bands

• Small band gap

• Large band gap

• No valence band

Which type of recombination involves traps or defects in the energy band gap?

• Radiative recombination

• Auger recombination

• Shockley-Read-Hall recombination

• Direct recombination