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Work and Energy
100
Dynamics
87
Kinematics
98
Transfer of Heat
51
Turning Effect of Forces
62
Gravitation
46
Matter Properties
94
Thermal Properties of Matter
103
Atomic and Nuclear Physics
101
Basic Electronics
101
Current Electricity
187
Electromagnetism
101
Electrostatics
123
Geometrical Optics
204
Information and Communication Technology
100
Simple Harmonic Motion and Waves
96
Sound
108
Show/Hide Answers
Physics
Which of the following terms is not used in the field of physics?
Latent heat
Nuclear fusion
Refractive index
Stock value
Stock value is not used in the field of physics.
Author:
rikazzz
Comment
Physics
What factors contribute to global winds?
Coriolis Effect
Convection Cells
Uneven warming of the earth by the sun
All of the above
Global winds are affected by convection current, pressure gradients, the Coriolis effect, and friction.
Author:
rikazzz
Comment
Physics
A radioactive substance does not undergo any change (in mass or charge) during
Gamma-emission
Oxidation
Alpha-emission
Beta-emission
Gamma-rays do not carry any charge. These rays do not have any mass and hence can not be considered to be made up of particles.
Author:
rikazzz
Comment
Physics
A real gas can act as an ideal gas in
High pressure and low temperature
Low pressure and high temperature
High pressure and high temperature
Low pressure and low temperature
Real gases approximate ideal gases when their pressure is relatively low, and their temperature reasonably high. A real gas deviates increasingly from ideality as it is compressed and cooled to near the point at which it will condense into a liquid. Compressing forces the molecules closer together so that intermolecular forces become stronger, and cooling reduces the kinetic energy of the molecules, so that they are more easily held by these forces.
Author:
rikazzz
Comment
Physics
Of the four locations mentioned below the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open
at sea level
at the top of Mt. Everest
at a place in a valley below sea level
in an aeroplane flying at a height of 10,000 m with inside pressure maintained at the sea level
Of the four locations mentioned below the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open at a place in a valley below sea level.
Author:
rikazzz
Comment
Everyday Science
Which of the following devices is used to measure potential difference between two points in a circuit?
Voltmeter
Galvanometer
Pycnometer
Ammeter
Author:
rikazzz
Comment
Physics
Fish and other aquatic creatures can live inside a deep frozen pond because
Fish are cold-blooded animals
Ice is a bad conductor of heat
There will always be water just beneath the ice level
They can adapt themselves to live in ice
All liquids have a boiling point and a freezing point. Underneath the frozen upper layer, the water remains in its liquid form and does not freeze. Also, oxygen is trapped beneath the layer of ice. As a result, fish and other aquatic animals find it possible to live comfortably in the frozen lakes and ponds.
Author:
rikazzz
Comment
Everyday Science
The heat received by a person sitting in front of a fire is due to which of the following mode(s) of heat of transfer?i) Conductionii) Convection iii) Radiation
only i and iii
ii only
iii only
only i and ii
Radiation refers to the emission of energy in rays or waves. Heat moves through space as energy waves. It is the type of heat one feels when sitting in front of a fireplace or around a campfire. It travels in straight lines at the speed of light.
Author:
rikazzz
Comment
Everyday Science
For nearby objects, eye lens is contracted and squeezed into a more convex shape by
Sclera
fovea
Ciliary muscles
pupil
So for nearby objects, the ciliary muscles contract and squeeze the lens into a more convex shape. This increase in the curvature of the lens corresponds to a shorter focal length.
Author:
rikazzz
Comment
Physics
Who was the first scientist to discover Electrons?
Albert Einstein
Isaac Newton
J.C. Bose
J.J Thompson
J.J. Thompson was the first scientists to discover electrons.
Author:
rikazzz
Comment
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