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Q. What are polar molecules? Give an example.
i) A polar molecule is one in that the centre of gravity of the positive charges is separated from the centre of gravity of the negative charges by a finite distance.
ii) Instance: N2O, H2O, HCl, NH3.
iii) They have an eternal dipole moment.
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What is the relationship among the period and the square root of the length? The graph is linear, so the period is proportional to the square root of the length of the string.
What is ground wave?
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Highest electrical resistivity exists in which wire??? nichrome wire.
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