Candela is the unit of:
temperature
electric potential
luminous intensity
energy
What is the distance in km of a quasar (farthest heavenly bodies) from which light takes 3 billion years to reach us?
2.8 x 1012 km
2.8 x 1022 km
3.8 x 1022km
3.72 x 1022 km
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
If an instrument gives nearly equal values in repeated measurements, it possess
Accuracy
Precession
Both accuracy and precession
Sensitivity
In a SONAR system, the duration between sending of a search wave and receiving back of the reflected wave from an enemy submarine is 77s.If speed of sound in water is 1450 m/s,find the distance of the energy submarine.
55.8km
65.8 km
52.8 km
62.8 km
One light year is equal to
9.467x1015 m
9.467x1014m
9.467 x 10 16m
9.467x1010m
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 maximum and minimum temperatures at a place are(40.6 ± 0.3)°C and (32.4 ± 0.2)°C.Calculate the difference in the temperatures with error limits.
(8.2 ± 0.5)°C
(8.0 ± 5.0)°C
(8.2 ± 5.0)°C
(8.0 ± 0.5)°C
The angle 1° 54′ equal to
2.91 x 10-4 radian
3.32 x 10-2 radian
1.21 x 10-6 radian
none of these
The force F on a spherre of radius r moving in a medium with velocity v is given by F = 6π ηrv.The dimensions of η are
[ML-3]
[MLT-2]
[MT-1]
[ML-1T-1]
