Electrostatics Question 150

Question: A parallel plate capacitor having a plate separation of 2 mm is charged by connecting it to a 300 V supply. The energy density is [BHU 2004]

Options:

A) 0.01J/m3

B) 0.1J/m3

C) 1.0J/m3

D) 10J/m3

Show Answer

Answer:

Correct Answer: B

Solution:

The energy density of parallel plate capacitor is given by U=12ε0E2=12ε0(Vd)2

=12×8.85×1012C2/Nm2×(300volt2×103m)2

=0.1J/m3



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