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BREAD
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1. Homework Statement
A large parallel plate capacitor with uniform surface charge σ on
upper plate and −σ on lower is moving with a constant speed v.
Q1]Find the magnetic field between the plates and also above and below them.
Homework Equations
The Attempt at a Solution
I know that above the top capacitor, direction of B is out of the page and into the page below the top capatitor.
and as for the bottom capacitor, above : into the page , below : out of the page.
so, between the plate , same amount of B are added into the page.
but i can't understand why above and below both plates the fields cancel