The blue colour of the sky is due to___________________?
The blue colour of the sky is due to___________________?
A. diffraction
B. reflection
C. polarization
D. scattering
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A current carrying conductor is placed in a uniform magnetic field parallel to it. The magnetic force experienced by the conductor is _____________________?
A current carrying conductor is placed in a uniform magnetic field parallel to it. The magnetic force experienced by the conductor is _____________________?A. F=1/B
B. F=1/Bsinθ
C. F/0
D. F=1/BcosθWhen one mirror of a Michelson Interferometer is moved a distance of 0.5 mm we observe 2000 fringes. What will be wavelength of light used ?
When one mirror of a Michelson Interferometer is moved a distance of 0.5 mm we observe 2000 fringes. What will be wavelength of light used ?A. 5000 nm
B. 5000A
C. 500m
D. 2000umIn case of planets the necessary acceleration is provided by______________?
In case of planets the necessary acceleration is provided by______________?A. Gravitational force
B. Frictional force
C. Coulomb force
D. Centripetal forceWhich of the following branch of Physics deals with the internal structure of earth?
Which of the following branch of Physics deals with the internal structure of earth?A. Biophysics
B. Geophysics
C. Plasma physics
D. Atomic physicsTo obtain a p-type semi-conductor Si Crystal must be doped with foreign atoms whose valency is_____________?
To obtain a p-type semi-conductor Si Crystal must be doped with foreign atoms whose valency is_____________?A. 2
B. 3
C. 4
D. 5The unit of radioactivity curie is equal to________________?
The unit of radioactivity curie is equal to________________?A. 3.74 x 109 disintegration per sec
B. 3.70 x 1010 disintegration per sec
C. 3.55 x 1010 disintegration per sec
D. 3.60 x 1010 disintegration per sec