Physics of solids

Written by Dr. Hamza Farooq (Physics)

Class 12 · Physics · 8 questions

Name: ____________________ Date: ____________

Stress is defined as:
- A Area / force
- B Force x area
- C Force per unit area
- D Extension per unit length
Young's modulus is the ratio of:
- A Stress to strain
- B Length to mass
- C Force to area
- D Strain to stress
The energy gap between the valence and conduction bands is largest in:
- A Conductors
- B Semiconductors
- C Superconductors
- D Insulators
The resistance of a semiconductor generally with rising temperature:
- A Decreases
- B Becomes infinite
- C Stays constant
- D Increases
A material that loses its resistance below a critical temperature is a:
- A Superconductor
- B Dielectric
- C Insulator
- D Semiconductor
The resistance of a metal generally increases with:
- A Cooling
- B Temperature
- C Pressure only
- D Dimming
A p type semiconductor is formed by adding:
- A Insulators
- B Acceptor impurities
- C Donor impurities
- D Metals
The elastic limit is the maximum stress up to which a material:
- A Breaks
- B Becomes magnetic
- C Returns to its original shape
- D Melts

Answer key

1. C, 2. A, 3. D, 4. A, 5. A, 6. B, 7. B, 8. C