JEE Main 2015 Physics question
If the capacitance of a nanocapacitor is measured in terms of a unit , made by combining the electronic charge , Bohr radius , Planck's constant and speed of light then
Answer: (1)
Solution
Capacitance is charge squared divided by energy, since the energy stored in a capacitor is , so . From the given constants the natural charge unit is and the natural energy unit on the atomic scale is (Planck's constant times
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