Question

The electric field outside the plates of two oppositely charged plane sheets of charge density σ is

Answer 1

Correct option ⇒ (d) zero

The electric field outside the plates of two oppositely charged plane sheet of charge density σ is ZERO .

Explanation :-

Let us take two parallel sheets , consider  Points P , Q ,R 
and surface density  = σ and –σ 

If the plane sheet having charge density σ  , then
E=σ/2ε₀

For first case :- 

For point P , If intensity is E₁ & E₂ , When the sheets are in opposite directions. So the intensity of E = 0

E=E₁-E₂
E=σ/2ε0 –σ/2ε0
E=0

For second case

For point Q , 

E=E1+E2
E= σ/2ε0 +σ/2ε0
E=σ/ε0

For third Case

For point R , If intensity is E₁ & E₂ , When the sheets are again in opposite directions for it's magnitude , So the intensity of E = 0

E=E1-E2
E= -σ/2ε0+ σ/2ε0
E=0

Hence E due to oppositely charged infinite plates = σ/ε0 , At any points ,so it must be zero for all outside points.

Hope it Helps :-)

Answer 2

Answer:

The answer is 0

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