(a) Newton's law of gravitation
(b) Boyle's law
(c) Pascal's principle
(d) Archimedes' principle
Answer:
Bernoulli's theorem is based on the conservation of
(a) Energy
(b) Mass
(c) Momentum
(d) All of the above
Answer:
When a body is immersed in a liquid, it force acting on it is
(a) Mass
(b) Upthrust
(c) Weight
(d) Upthrust and Weight
Answer:
On which of the following principles does a rocket work?
(a) Conservation of Energy
(b) Conservation of Mass
(c) Conservation of Inertia
(d) Conservation of momentum
Answer:
The period of pendulum depends upon
(a) Energy
(b) Amplitude
(c) Mass
(d) Length
Answer:
Which are the relevant waves in telecommunication?
(a) Red rays
(b) Micro waves
(c) X-rays
(d) Violet-rays
Answer:
Air bubble in water behaves as a
(a) Plane glass
(b) Convergent lens
(c) Divergent lens
(d) None of these
Answer:
To an observer on the lunar surface, during the day time the sky will appear to be
(a) Blue
(b) Light yellow
(c) Orange
(d) Black
Answer:
The chemical part of the dye that absorbs light and produces colour is called
(a) a photochrome
(b) a pigment
(c) neon
(d) a chromophore
Answer:
A water tank appears shallower when it is viewed from top due to
(a) Refraction
(b) Reflection
(c) Rectilinear propagation of light
(d) Total internal reflection
Answer: