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Grade: 12th pass
        
A large conducting plane has a surface charge density 1*10^-4 C/m2. Find the electrostatic energy stored in a cubical volume of edge 1 cm in front of the plane.
2 months ago

Answers : (2)

Arun
23342 Points
							
Here,
σ = 1.0×10-4 Cm-2
a = 1.0×10-2 m
V = a3 = 1.0×10-6 m3
Electric field due to an infinite conducting plane is E = σ/εo
Electric energy stored per unit volume is given by
u = ½ (εoE2)
Energy stored in the given volume
U = ½εoE2a3
=> U = ½εo (σ/εo ) 2a3
=> U = a3σ2/2ε0
=> U = 1.0×10-6 ×(1.0×10-4)2/(2×8.85×10-12)
=> U = 5.6×10-4 J
2 months ago
Vikas TU
9769 Points
2 months ago
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