Week 5 Faraday Cages and Energy in Electrostatic Field Flashcards
1
Q
what are Faraday cages used for
A
Isolating regions from the outside world electromagnetically
2
Q
briefly describe how faraday cages work
A
free electrons rearrange so that there is a separation of charge creating an internal E field that opposes the external one
3
Q
what is the energy density in an electrostatic field equation
A
UD = 1/2 εE^2
4
Q
what is the parallel plate capacitor potential energy equation
A
U = 1/2 Q^2/C
