Engineering Physics Mid - II, March - 2015

1.A successful explanation of quantum theory is by
  • Photo electric effect & Compton effect
  • Polarization & block body radiation
  • Interference & diffraction
  • All the above
Answer: D
2.Identify the De-Broglie’s principle (formula) among the following
  • All
Answer: D
3.Ni (Nickel) as a target material in
  • G.P Thompson experiment
  • Compton Experiment
  • Newton’s experiment
  • Davison &Germer experiment
Answer: D
4.Maxwell-Boltzmann statistics involves which type of particles
  • Classical
  • Quantum
  • Bosons
  • Fermions
Answer: A
5.The density of electron state at energy(E) can be expressed as
  • /2 (8m/h2)2/3E1/2
  • /2 (8m/h2)3/2E1/2
  • /2 (8m2/h2)2/3E
  • /2 (8m/h2) 3/2E
Answer: B
6.Pick out the correct relation among the following
Answer: C
7.Depending on which parameter the spontaneous polarization will be exhibited
  • Dimensions of the dielectrics
  • pressure
  • Direction of electron
  • color
Answer: A
8.Which one of the following will show piezoelectric effect
  • platinum
  • barium titnate
  • gold
  • bismuth
Answer: B
9._______ are used in output transformers in television sets and rod aerials
  • Manganese Zinc ferrite
  • barium ferrite
  • strontium ferrite
  • Magnesium Aluminum ferrite
Answer: A
10.The material used for magnetic levitation is
  • Dia magnetic
  • Perfect dia magnetic
  • Ferro magnetic
  • Perfect ferro magnetic
Answer: B
11.De-Broglie’s hypothesis is valid for accelerated __________.
Answer: microparticles
12.Black body radiation in Rayleigh-jeans law, the energy is ________
Answer: Equipartition
13.Fermi energy is Energy of __________ occupied state
Answer: highest
14.Fermi –Dirac distribution function is_________
Answer:
15.Schrodinger’s time dependent wave equation is______________
Answer:
16.The dielectric substances in polar molecules undergo orientation polarization due to _____
Answer: rotation
17.As the area of hysteresis loop increases then dielectric loss ____
Answer: increases
18.Below ______ the ferromagnetic materials exhibit hysteresis
Answer: Ferromagnetic Curie temperature
19._________ is the result of Lenz’s law in electromagnetic induction.
Answer: Diamagnetism
20.The nuclear magnetic momentum is expressed in the unit of nuclear-magneton ‘􀟤n’ its value is _____
Answer: 5.05×10-29A-m2