Difference between emf and pd
ananthesh asked: “can you please explain about emf and PD of a cell?” Answer: EMF stands for electromotive force. EMF of a cell is equal to the potential difference between the two terminals of a cell...
View ArticleAIEEE Will Finally Go Online For The First Time in 2011
All aspiring candidates of engineering and architecture courses prefer to take online test instead of regular pen-paper based format. AIEEE is finally about to conduct its online entrance exams on 1st...
View ArticleMAGNETISM : Why repulsion is told to be the test for magnetism?
Sreeda sked: “Can a magnet lose its magnetic properties?How? Why ‘repulsion’ and not ‘attraction’ is suggested to be a good test of finding whether a substance is a magnet or not?” Answer: A magnet...
View ArticleWhy don’t we feel Earth’s Rotation?
Sreeda Asked: “Why are we not feeling Earth’s rotation while it is actually happening” Answer: It is just like we don’t feel like moving when we are inside a train moving with constant velocity and...
View ArticleWhy does a test tube seem silvery when put in water?
Amritha Asked: Why does a test tube seem silvery when put in water? Answer: This is due to Total Internal Reflection. When an empty test tube is inserted in water, the light trying to enter the test...
View ArticleA Numerical from Kinematics
Advait Asks: “A test projectile is fired horizontally into a viscous liquid with a velocity u.The retarding force is propotional to the square of the velocity, so that the acceleration becomes...
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