Faraday cage in danger?

Electricity and Magnetism Level 2

The above figure shows a Faraday cage that is an enclosure formed by a conductive material or a mesh of such material. If a Faraday cage which has a cubic shape with edge length 2 m 2 \text{ m} is placed in an electric field of E = 400 V/m , E = 400 \text{ V/m}, what is the electric field in the cage?

0 V/m 0 \text{ V/m} 400 V/m 400 \text{ V/m} 800 V/m 800 \text{ V/m} 200 V/m 200 \text{ V/m}

Krishna Singh by Krishna Singh , 22, India

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3 solutions

Andrew Song
Sep 2, 2015

Since the cage is conductive, there will be no net electric field inside.

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Mudit Singh
Aug 14, 2015

all the electric field is on the surface of the conductor so as to follow coulombs law so there will be no field inside the faraday's cage ( else dyanamo would be dead by now :P)

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David Ibrahim
Jun 27, 2015

the electric field through a closed surface equal zero because what enters goes out ......... the same goes with the magnetic field by the way

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