Tag: Technology

Questions asked in Physics Viva Voce for Class 12 Physics Practical

Double Folded Resistance coil

Q1. Why are the resistances used in a resistance box is like 1,2,2,5,10,20,20,50,100,200,200,500,1000,2000,2000,5000 etc? Ans: In this arrangement all natural numbers upto 10000 ohms (and above) can be realized. 1, 2, 2+1=3,2+2=4,5,5+1=6,5+2=7,5+2+1=8,5+2+2=9 etc Try it yourself to get all numbers from 1 to 10000 Q2. Why wire is double folded in resistance box? Ans: The …

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Inside a Car Engine

(Internal Combustion Engine) We cannot imagine modern life without the car. The automobile has been one of the singular most amazing inventions of the 21st century and almost defines modern times. Inside of most mechanical petroleum based vehicles is the internal combustion engine. Today we shall have a brief look at the internal combustion engine …

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Hydrogen Economy

  As the world’s fossil fuels are continuously depleted with increasing use we run the risk of facing a shortage soon enough in the future.  Alternatives are a must as we already face the heat here in India with capping of LPG cylinders. One of the biggest consumers of fossil fuels are petroleum-based vehicles. Whether …

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Ocean Energy

Ocean energy Now renewable energy sources come in various forms and make great pollution alternatives to coal and other exhaustive resources. Now scientists have been looking for all sorts of alternatives and creativity is often more valued than analytical solutions. Our great oceans store vast amounts of energy in the form of heat(anyone remember that …

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Quick Revision for Class X Physics SA1

CHAPTER -12 ELECTRICITY GIST OF THE LESSON Positive and negative charges: The charge acquired by a glass rod when rubbed with silk is called positive charge and the charge acquired by an ebonite rod when rubbed with wool is called negative charge. Coulomb: It is the S.I. unit of charge. One coulomb is defined as that …

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