1.

Explain the underlying principle of working of a parallel plate capacitor . If two similar plates , each of area A , having surface charge densities +sigma and -sigma are separated by a distance 'd' in air , write expression for : the capacitance of the capacitor so formed .

Answer»

Solution :For underlying principle of working of a PARALLEL plate capacitor .
If TWO similar plates , each of area A , have surface charge densities `+SIGMA` and `-sigma` and are separated by a distance d in air , then
capacitance of the capacitor so FORMED `C = (O)/(V_(1) - V_(2)) = (sigma A)/((sigma)/(in_(0)) d) = (in_(0) A)/(d)`


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