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Three identical metal plates with large surface areas are kept parallel to each other.The leftmost plate is given a charge Q, the rightmost is given a charge -2Q & the middle one remains neutral.Find the charge appearing on the outer surface of the rightmost plate. { plzz let me know how to you take the sign meaning + or - for the electric field due to each surface of the plate}

Three identical metal plates with large surface areas are kept parallel to each other.The leftmost plate is given a charge Q, the rightmost is given a charge -2Q & the middle one remains neutral.Find the charge appearing on the outer surface of the rightmost plate.      { plzz  let me know how to you take the sign meaning + or - for the electric field due to each surface of the plate} 

Grade:11

2 Answers

Arun Kumar IIT Delhi
askIITians Faculty 256 Points
8 years ago
Let's say three plates charges Q1,Q2,Q3
We find equations by assuming electric field in the conductor zero.
Charges are conserved on each plate.
Thanks & Regards
Arun Kumar
IIT Delhi
Askiitians Faculty
NDACE
11 Points
6 years ago
GOOD effort.
Please correct the last line, rest of the answer is correct.
last point is wrong Qa,right = +3Q/2

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