Veto q&a 7 Month22 (1)

@scientech
2018
April
action-Reaction law
Physics
Q The medium in which sound has the maximum speed
A. Steel (Solid)
• Branch of Science deals with the Scientific study
of sound
acoustics
• Unit of sound
Decibel (dB)
Q The temperature at which molecular action stops
completely
A. -273 0 c
• S I Unit of temperature
Kelvin (K)
• Temperature at which density of water is maximum
4 0 c
Q The rays used in the remote control of TV
A. infrared Rays
• The heating rays emitted by high temperature
bodies
infrared Rays
Q Kaleidoscope is based on the principle of
A. Multiple Reflection
• Optical Fibre Works on the Principle of
Total Internal Reflection (TIR)
Q Newton’s 1 st Law of Motion gives definition for
A. inertia
• 2 nd law gives definition for
Force, F=ma, where m= mass, a=
acceleration due to gravity
• Another name of Newton’s 3 rd law of motion
action-Reaction laws
Q What is the voltage of electricity used for domestic
purpose
A. 230 v
• The frequency of alternating current in India
50 Hz
• Working Principle of Transformer
mutual induction
Q Which type of mirrors is used in headlights of cars
A. concave mirrors
Q What are the three primary colours of Television
A. Red, green, Blue
Q&a no @ Sea
• Colour which absorbs all colour
Black
• Colour which reflects all colour
White
• Colour having the highest wavelength and
shortest frequency
Red
• Colour having the shortest wavelength and
highest frequency
violet
Q The principle behind hydraulic press
A. Pascal’s law
• Principle behind the floating of ships and boats
archimedes Principle of Buoyancy
Q&a maestros
important discoveries related to Physics
Discoveries
law of motion
atomic theory
Law of floatation
electro magnetic induction
Dynamite
electron
Principle of Relativity
Persons related
isaac newton
John Dalton
archimedes
michael Faraday
alfred nobel
J.J. thomson
albert einstein
Q&A Bonus
Founder of Rahnumai mazdayasan Sabha - Dada Bhai naoroji
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