Quiz1

All operators in quantum mechanics have

• eigen functions and eigen values

• only eigen function

• only eigen value

• non of the above

For a free particle in a cubical box, the degeneracy of the first excited state is

• two-fold

• three-fold

• six-fold

• nine-fold

Metals are good conductors of electricity because

• they contain free electrons
• the atoms are lightly packed 
• they have high melting point
• all of the above

Pa (Pascal) is the unit for

• Thrust
• Pressure
• Frequency
• Conductivity

Stars appears to move from east to west because

• All stars move from east to west
• The earth rotates from west to east
• The earth rotates from east to west
• The background of the stars moves from west to east