Question

Three identical metal plates of area 'A' are at distance d₁& d₂ from each other. Metal plate A is uncharged, while plate B & C have respective charges +q & – q. If metal plates A &C are connected by switch K through a consumer of unknown resistance, what energy does the consumer give out to its surrounding?

Assume d₁ = d₂ = d

• A. $\frac { q ^ { 2 } d } { 4 \varepsilon _ { 0 } \mathrm {~A} }$
• B.
• C. $\frac { q ^ { 2 } d } { 2 \varepsilon _ { 0 } A }$
• D.

Answer 1

Answer: (A)

$\frac { q ^ { 2 } d } { 4 \varepsilon _ { 0 } \mathrm {~A} }$

Answer 2

Energy loss = ×V² = ×

= =