Null vector is a vector which has________________?
(A) Zero magnitude
(B) No specified direction
(C) Both A and B are correct
(D) Both A and B are not correct
If east, west, north, south, up and down are representing the direction of unit vectors, then east x south has the direction along_____________?
(A) West
(B) North
(C) Down
(D) Up
The direction of the vector product is given by______________?
(A) Head to tail rule
(B) Right-hand rule
(C) Left-hand rule
(D) Triangular rule
For chain reaction to build up the size of the radioactive target should be______________?
(A) Greater than the critical size
(B) Less than the critical size
(C) Equal to the critical size
(D) All of above can build up a change reaction
One AMU is equal to__________________?
(A) 1.66 x 10-27kg
(B) 166 x 10-15ng
(C) 166 x 10-20g
(D) All of above
During fusion of hydrogen into helium________________?
(A) Energy is absorbed
(B) Energy is released
(C) Mass is increased due to energy absorption
(D) Mass is reduced due to the energy released
In the nucleus of uranium, the number of neutrons will be _____________?
(A) 92
(B) 235
(C) 143
(D) Different for different isotopes
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
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