Chapter 22
Gauss's Law
, 22.1 Charge and Electric Flux
A box containing an
unknown amount of use test charge to
charge measure E-field
outside the box
• the box is a closed surface since it completely
encloses a volume
• to know what is inside we only need to measure E
on the surface of the box 2
, the E-field vectors
point out of the
surface
outward
electric flux
the E-field vectors
point into the
surface
inward
electric flux
3
Gauss's Law
, 22.1 Charge and Electric Flux
A box containing an
unknown amount of use test charge to
charge measure E-field
outside the box
• the box is a closed surface since it completely
encloses a volume
• to know what is inside we only need to measure E
on the surface of the box 2
, the E-field vectors
point out of the
surface
outward
electric flux
the E-field vectors
point into the
surface
inward
electric flux
3
