Answer:
(b) 7.2 mJ
Explanation:
ENERGY STORED IN CAPACITOR: the energy is stored in capacitor in electric field
which can be calculated by expressions
E=[tex]\frac{1}{2}[/tex] c [tex]v{^2}[/tex]
=[tex]\frac{1}{2}[/tex] [tex]10^{-6}[/tex][tex]120^{2}[/tex]
=7200×[tex]10^{-6}[/tex] J
= 7.2×[tex]10^{-3}[/tex] J
=7.2 mJ
