The fission chain reaction in a nuclear reactor can be controlled by introducing _______________?

A. Iron rods
B. Graphite rods
C. Cadmium rods
D. Platinum rods

Torque is defined as______________?

A. Turning effect of force
B. Cross product of position vector and force
C. Product of force and moment arm
D. All a, b and c are correct

The dimension of torque is______________?

A. [ml2t-2]
B. [mlt-2]
C. [ml2t]
D. [ml-2t-2]

SI unit of torque is______________?

A. N.m
B. Joule
C. Both a and b are correct
D. Neither a nor b is correct

Torque acting on a body determines_______________?

A. Acceleration
B. Linear acceleration
C. Angular acceleration
D. Direction of motion of the body

A body in equilibrium__________________?

A. Always at rest
B. Always in uniform motion
C. May be at rest or in uniform motion
D. May be at rest or in motion

A body will be in complete equilibrium when it is satisfying______________?

A. 1st condition of equilibrium
B. 2nd condition of equilibrium
C. Both ist and 2nd condition of equilibrium
D. Impossible

Which one is not a type of dynamic equilibrium ?

A. Rotational equilibrium
B. Translational equilibrium
C. Static equilibrium
D. Both a and c are corret answer

According to which one of following law the density of atom is uniform ?

A. J.j.thomson model
B. Rutherfords model
C. Bohrs model
D. All of the above laws contradict the statement

In the nucleus of uranium, the number of neutrons will be _____________?

A. 92
B. 235
C. 143
D. Different for different isotopes