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Q.1: Semi-conductors with donor atoms and free electrons belong to the type——–?
- n
- p
- mix
- any of above
A
Q.2: A body will be in complete equilibrium when it is satisfying——-?
- 1st condition of equilibrium
- 2nd condition of equilibrium
- Both Ist and 2nd condition of equilibrium
- Impossible
C
Q.3: Which one is not a type of dynamic equilibrium ?
- Rotational equilibrium
- Translational equilibrium
- Static equilibrium
- Both A and C are corret answer
C
Q.4: According to which one of following law the density of atom is uniform ?
- J.J.Thomson model
- Rutherfords model
- Bohrs model
- All of the above laws contradict the statement
B
Q.5: In the nucleus of uranium, the number of neutrons will be ——-?
- 92
- 235
- 143
- Different for different isotopes
D
Q.6: During fusion of hydrogen into helium——–?
- Energy is absorbed
- Energy is released
- Mass is increased due to energy absorption
- Mass is reduced due to the energy released
B
Q.7: One AMU is equal to———?
- 1.66 x 10-27kg
- 166 x 10-15ng
- 166 x 10-20g
- All of above
D
Q.8: For chain reaction to build up the size of the radioactive target should be——-?
- Greater than the critical size
- Less than the critical size
- Equal to the critical size
- All of above can build up a change reaction
A
Q.9: Antimatter consists of ——-?
- Antiproton
- Antineutron
- Positron
- All of above
D
Q.10: Neutron and proton are commonly known as——-?
- Nucleon
- Meson
- Boson
- Quartz
A