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Q. What are non-polar molecules? Give an example.
i) A non-polar molecule is one in that the centre of gravity of the positive charges coincides with the centre of gravity of the negative charges.
ii) Instance O2, N2, H2.
iii) The non-polar molecules don't have a permanent dipole moment.
What do you mean by normal shift? Derive the mathematical expression for normal shift produced when an object in a denser medium is viewed normally through air.
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Wires A as well as wire B are both made out of copper. Wire B is double as long as wire A. The diameter of wire B is doubles that of wire A. Answer: Resistivity is a charac
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