10:03.pdf

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Where is my clicker number?
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Reading for next time 22-1 22-2
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Other business… Number of midterms = 2 Server down on Sunday due to power outage in physics Should be back up soon
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FlipIt Physics Lots of questions about flux We will deal with this next time . I haven’t forgotten the questions. We will talk today about field lines and forces on charges .
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E field from a charge distribution Electric Field from a collection of charges: Electric Field from a continuous charge distribution: ~ E ( ~ r 0 ) = X j 6 =0 k q j r 2 j, 0 ˆ r j, 0 origin observer E ( r ) r r dq r r r ~ E ( ~ r ) = k Z dq ~ r 0 ~ r - ~ r 0 | ~ r - ~ r 0 | 3
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E field from a charge distribution Electric Field from a 1D source: [ λ ] = C/m 1 Electric Field from a 2D source: [ σ ] = C/m 2 Electric Field from a 3D source: [ ρ ] = C/m
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