Physics 122 4 25 11 4 25 11 Physics 122 1 4 25 11 Physics 122 2 4 25 11 Physics 122 3 Prof E F Redish 1 Physics 122 4 25 11 Answer 1 in 30 billion 4 25 11 Physics 122 4 4 25 11 Physics 122 7 I q t ma Fe bv a 0 v Fe b Fe qE V 4 25 11 Prof E F Redish Physics 122 E L 8 2 Physics 122 4 25 11 I qnAv v I qnA qE bv V EL V IR 4 25 11 V L q V bI L qnA E bL V I 2 IR q nA 9 Physics 122 bL L 1L R 2 q nA A gA 4 25 11 10 Physics 122 P rate of doing work using energy number of charges moved W t force distance moved in a time t P nAL qE v t V nAL qv qnAv V I V t L 4 25 11 Prof E F Redish Physics 122 11 3 Physics 122 4 25 11 P I V 4 25 11 Physics 122 12 4 25 11 Physics 122 13 4 25 11 Physics 122 14 Prof E F Redish 4 Physics 122 4 25 11 No resistance constant v even without gravity No resistance constant v even without gravity Resistance 4 25 11 constant v even with gravity mg bv Physics 122 4 25 11 Physics 122 16 4 25 11 Physics 122 17 Prof E F Redish 15 5 Physics 122 4 25 11 4 25 11 Physics 122 18 4 25 11 Physics 122 19 pump and storage bin battery sluices wires water wheel bulb 4 25 11 Prof E F Redish Physics 122 20 6 Physics 122 4 25 11 4 25 11 Physics 122 21 4 25 11 Physics 122 22 V IR 4 25 11 Prof E F Redish Physics 122 23 7 Physics 122 4 25 11 V IR 4 25 11 Physics 122 24 4 25 11 Physics 122 26 V VA VB IReff IRA IRB A Reff RA RB B I IA IB V V V Reff RA RB 1 1 1 Reff RA RB 4 25 11 Prof E F Redish Physics 122 A B 27 8
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