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A. A device to store electrical charge i...

A. A device to store electrical charge is called
a. Transformer
b. Capacitor
c. Resistor d. Inductor
B. What is meant by energy density of a parallel plate capacitor?
C. Derive an expression for the energy stored in a parallel plate capacitor.
D. What is the area of the plates of a `0.1muF` parallel plate air capacitor, given that the separation between the plates is 0.1 mm.

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(March 2015)
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