Which of the following is most elastic
(a) Steel
(b) Plastic
(c) Rubber
(d) Wet clay
Answer:
A liquid drop attains spherical shape due to
(a) Upward thrust
(b) Gravitation
(c) Surface tension
(d) Viscosity
Answer:
Which of the following is a scalar quantity?
(a) Force
(b) Angular momentum
(c) Velocity
(d) Electrostatic potential
Answer:
If a sound travels from air to water, the quantity that remain unchanged is
(a) Wavelength
(b) Amplitude
(c) Velocity
(d) Frequency
Answer:
Which of the following natural source of gamma-rays
(a) Radon Gas
(b) Radio Carbon
(c) Radio Cobalt
(d) Radio Phosphorus
Answer:
The refractive index of a piece of transparent quarts is the greatest for
(a) Green light
(b) Violet light
(c) Red light
(d) Yellow light
Answer:
Which one of the following phenomena can not be attributed to the refraction of light?
(a) Rainbow
(b) Redshift
(c) Twinkling of stars
(d) Mirage
Answer:
In optical instruments, the lenses are used to form image by the phenomenon of
(a) scattering
(b) Diffusion
(c) Reflection
(d) Refraction
Answer:
The British Government introduced the Portfolio System for the first time in
(a) 1855
(b) 1861
(c) 1865
(d) 1870
Answer:
The Whitley Commission was concerned with
(a) Reorganization of civil service
(b) Public health
(c) Education
(d) Labour
Answer: