30: the direction of torque can be found out by
a) Right hand rule
b) Fleming left hand rule
c) Knowing the direction of ‘r’
d) Head to tail rule
31: no K.E energy possessed by
a) A shooting star
b) A pendulum at the bottom of its swing
c) An elevator standing at the fifth floor
d) Cyclone
32: The rate of change of angular momentum of a body is equal to
a) Impulsive force
b) Applied force
c) Moment of inertia
d) The applied torque
33: a skater moves with a constant velocity of 12m/s . if her momentum is 600kgm/s, what its mass?
a) 72kg
b) 60kg
c) 50kg
d) 46kg
34: si unit of torque is
a) N.m
b) Joule
c) Both a & b
d) Neither a nor b is correct
35:2 During second half life original materials decayed:
a) One quarter
b) Two quarter
c) Three quarter
d) None of these
36: In cyclotron the time required to complete one semi-circle of radius “r” is?
a) t= π/qm
b) t= πm/q
c) t= πm/qB
d) t= qB/πm
37: Angular frequency of cyclotron is independent of
a) r
b) v
c) q/m
d) r & v
38: According to the fundamental equation of cyclotron, frequency is directly proportional to
a) magnetic field
b) electric field
c) both a & b
d) none of these
39: When the distance between the nucleons is . . . . 10-13cm, the nuclear forces is into strong repulsive forces
a) <
b) >
c) ≈
d) None of these
For Answer Please see this video
40: In cyclotron oscillating electric field provide the . . . . . to ions
a) Electric field
b) Frequency
c) Velocity
d) Direction
41: A travelling wave LINAC can accelerate electrons up to . . . .
a) 103KeV
b) 103MeV
c) 103GeV
d) 103TeV
42: In electrostatic generator, which are moved downward by the conveyor belt?
a) Atoms
b) Negative ions
c) Positive ions
d) None of these
43: LINAC consists of cylindrical electrodes with . . . . . length?
a) Fixed
b) Increased
c) Decreased
d) All
44: Synchrotrons have its energy limit due to
a) Energy
b) Relativistic mass
c) Radiation emission
d) Velocity
45: Rutherford considered nucleus at the centre of atom as a
a) Positive charge
b) Negative charge
c) Concentrated energy
d) None of these
