(a) Kailashnath Katju
(b) Rafi Ahmad Kidwai
(c) M.C. Sitalwar
(d) B.R. Ambedkar
Answer:
The velocity of rain drop attains constant value because of
(a) Air currents
(b) Viscous force exerted by air
(c) Surface tension
(d) Upthrust of air
Answer:
Fat can be separated from milk in a cream separator because of
(a) Centripetal force
(b) Centrifugal force
(c) Cohesive force
(d) Gravitational force
Answer:
A liquid drop tends to assume a spherical shape because of
(a) Gravitational force
(b) Elastic force
(c) Surface tension
(d) Viscous force
Answer:
The relative humidity of air can decrease in spite of an increase in the absolute humidity when the
(a) Temperature falls
(b) Temperature rises
(c) Pressure rises
(d) Pressure falls
Answer:
The Doppler's effect is applicable for
(a) Space wave
(b) Light wave
(c) Sound wave
(d) Light wave and sound wave
Answer:
Sound waves of wavelength greater than that of audible sound are called
(a) Sonic wave
(b) Seismic waves
(c) Ultrasonic wave
(d) Infrasonic wave
Answer:
Mirage is observed in a desert due to the phenomenon of
(a) Double refraction
(b) Scatering
(c) Interference
(d) Total reflection
Answer:
The phenomenon of splitting white light into seven colours is called
(a) Refractive index
(b) Disperson
(c) Reflection
(d) Refraction
Answer:
Who among the following organized the famous Chittgong armoury raid?
(a) Batukeshwar Datta
(b) J.M. Sengupta
(c) Laxmi Sehgal
(d) Surya Sen
Answer: