(CAR) Physics Flashcards
What are primrary colours
Colours which cannot be produced.
(Primary colors include red, blue and yellow. Primary colors cannot be mixed from other colors. They are the source of all other colors)
Air bubble in water shines coz of the phenomenon of
Total Internal Reflection
(the phenomenon which occurs when a propagated wave strikes a medium boundary at an angle larger than a particular critical angle with respect to the normal to the surface.)
The advantage of AC over DC is that
It can be transmitted over long distances with minimum power loss
What minimum escape velocity required for a rocket to be launched in space
11 km per sec
____ device is used to step up or step down the voltage of alternating current
Transformer
The spherical shape of a small drop of rain is due to
Surface Tension
The cohesive forces between liquid molecules are responsible for the phenomenon known as surface tension.
The blue colour of the sky can be attributed to
Differential scattering of sunlight by the atmosphere
____ colour has the longest wavelength
Red
_____ mirror can be used to focus sunliight
Concave Mirror
_____ is a good conductor of electricity
Graphite
Conductors conduct electrical current very easily because of their free electrons.
On ____ principles the tape recorder funtions
Electromagnetic Induction
When a constant force is applied to a body it moves with uniform
Velocity
The silvered surface of thermoflask prevents transfer of heat by
Radiation
Tube light works on the principle of
Discharge of electric through gases
In a refrigerator, cooling is produced by
The evaporation of volatile liquid
Air is removed from an electric bulb to prevent
Oxidation of tungsten filament
On earth a moving body comes to rest by itself coz of the
Forces of Friction
(Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other)
An electric motor is used to convert
Mechanical energy into electrical energy
Energy of a body due to its motion is called
Kinetic Energy (he kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity)
The energy stored in stretched spring is
Elastic Potential Energy
In cells Chemical energy is transformed into
Electrical Energy
When a body is dropped from a certain height, the gravitaional potential energy is converted into
Kinetic Energy
Human body converts chemical potential energy of food into
Heat Energy
Electromechanical energy is required for the working of
Nervous system
