Quiz for Semiconductors

Q1: What is the main characteristic of a semiconductor?

A. Conducts electricity under certain conditions B. Always insulator C. Always conductor D. Does not conduct electricity

Q2: Which element is commonly used as a semiconductor?

A. Silicon B. Copper C. Iron D. Gold

Q3: What type of semiconductor is pure silicon?

A. Intrinsic B. Extrinsic C. P-type D. N-type

Q4: In n-type semiconductors, majority carriers are:

A. Electrons B. Holes C. Protons D. Neutrons

Q5: In p-type semiconductors, majority carriers are:

A. Holes B. Electrons C. Protons D. Neutrons

Q6: Which element is used to make p-type silicon?

A. Boron B. Phosphorus C. Arsenic D. Antimony

Q7: Which element is used to make n-type silicon?

A. Phosphorus B. Boron C. Gallium D. Aluminum

Q8: What is the energy gap of silicon semiconductor?

A. 1.1 eV B. 0.5 eV C. 2.0 eV D. 3.0 eV

Q9: Which property distinguishes semiconductors from conductors and insulators?

A. Energy gap B. Color C. Density D. Magnetic properties

Q10: Semiconductors are used in:

A. Diodes and transistors B. Motors C. Transformers D. Batteries

Q11: What happens when temperature increases in a semiconductor?

A. Conductivity increases B. Conductivity decreases C. No change D. Becomes insulator

Q12: What is the function of a diode?

A. Allow current in one direction B. Store energy C. Amplify signal D. Generate power

Q13: Which semiconductor device is used as a switch or amplifier?

A. Transistor B. Diode C. Resistor D. Capacitor

Q14: The p-n junction is formed by:

A. Joining p-type and n-type semiconductors B. Pure silicon C. Metal and semiconductor D. Two metals

Q15: What is the depletion region in a p-n junction?

A. Region depleted of free charge carriers B. Region of high conductivity C. Metallic region D. Region full of electrons

Q16: Forward biasing a p-n junction:

A. Reduces barrier and allows current B. Increases barrier and blocks current C. Changes it to an insulator D. Makes it magnetic

Q17: Reverse biasing a p-n junction:

A. Increases barrier and blocks current B. Allows current freely C. Short circuits the junction D. Generates electricity

Q18: What is an intrinsic semiconductor?

A. Pure semiconductor without doping B. Semiconductor with impurities C. Metal D. Insulator

Q19: What is the role of majority carriers?

A. Carry most of the electric current B. Are impurities C. Do not conduct D. Generate heat