MID-I

The probability density is the

• Square root of wave function

• Absolute value of wave function

• Inverse of wave function

• Absolute square of wave function

Davisson and Gremer experiment relates to

• Interference  

• Electron Diffraction

• Polarization

• Phospherence

The minimum energy required for photoelectron to escape from metal plate in a photocell is called

•       Work function

•    Threshold frequency

•      Stopping voltage

• Plancks constant

Compton shift depends on

• Incident radiation

• Nature of scattering substance

• Angle of scattering

• Amplitude of frequency

Light exhibits

• Particle nature

• Wave nature

• Particle and wave nature

• Monochromatic

In compton effect there is no scattering if

• scattering angle is 90 degrees

• recoiling angle is 90 degrees

• Scattered angle is 0 degrees

• scattered angle is 90 degrees

Germanium is

• Pure Semiconductor

• Impure semiconductor

• Intrinsic semiconductor

• a & b are true

Semiconducting materials are

• conductors at low temperatures

• insulators at high temperature

• Conductors at high temperatures

• Insulators at room temperature

Valency of an acceptor impurity is

• 4

• 3

• 5

• 3 or 5

Fermi level in ntype semiconductor lies

• closer to conduction band

• middle of energy gap

• closer to valence band

• between conduction and valence band