Question

.The capacity of a parallel plate air capacitor is 10 uF and it is given a charge of 40 C. The
electrical energy stored in the capacitor is
a) 400 erg
b) 600 erg
c) 800 erg
d) 900 erg
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Answer 1

Answer:

correct answer is (c) 800 ergs

Explanation:

energy=q^2/2C. so E= 800*10^7 J=800erg