The number of electrons that would weigh 9.11 kg is
1019
1027
1031
1030
The ratio of the dimensions of Planck's constant and that of the moment of inertia is the dimension of
frequency
velocity
angular momentum
time
The time period of a simple pendulum is given by Tα la gh . The value of a and b are
1, ½
½, -1
½, -½
½,½
The angle subtended by a satellite by the two directions of observation is 2.552 x 10-2 rad.If the diameter of earth is 1.276 x 107m. What is the distance of the satellite from the earth?
6 x 108 m
5 x 108m
2.5 x 108m
4 x 108m
A LASER beam at moon returns after 2.56 s from moon.What is the radius of the orbit of moon (lunar orbit) around the earth?
3.84 x 108 m
3 x 108 m
3.84 x 104 m
3.84 x 1010 m
The error in the measurement of radius of a sphere is 2%. What would be the error in the volume of the sphere?
4%
8%
3%
6%
Dimensional formula for self - inductance is
[MLT-2A-2]
[ML2T-1A-2]
[ML2T-2A-2]
[ML2T-2A-1]
The density of a cube is measured by measuring its mass and length of its sides.If the maximum error in the measurement of mass and length are 4% and 3% respectively,the maximum error in the measurement of density will be
7 %
9 %
12 %
13 %
The time dependence of physical quantity p is given by p = p0 exp (-αt2), where α is a constant and t is the time.The constant α
is dimensionless
has dimensions[T-2]
has dimensions[T2]
has dimensions of p
The percentage errors in the measurement of mass and speed are 2 % and 3 % respectively.The error in kinetic energy obtained by measuring mass and speed ,will be
10 %
8 %
2 %