Physics 122 4/27/11 Prof. E. F. Redish 1 4/27/11 1 Physics 122 4/27/11 2 Physics 122 9.1 9.2 9.3 9.4 a 77% 2% 73% 16% b 0% 14% 18% 58% c 2% 83% 5% 6% d 2% 0% 2% 6% e 2% 0% 1% 3% bc 0% 0% 2% 12% cd 17% 0% 0% 0% 4/27/11 4 Physics 122Physics 122 4/27/11 Prof. E. F. Redish 2 4/27/11 5 Physics 122 4/27/11 6 Physics 122 tqIΔΔ=ma = Fe− bva = 0 ⇒ v =FebFe= qEE = −ΔVL4/27/11 7 Physics 122 P = I ΔVPhysics 122 4/27/11 Prof. E. F. Redish 3 4/27/11 8 Physics 122 4/27/11 9 Physics 122 IRV =Δ4/27/11 10 Physics 122 ΔV = IRPhysics 122 4/27/11 Prof. E. F. Redish 4 4/27/11 12 Physics 122 4/27/11 13 Physics 122 ΔV = ΔVA+ ΔVBIReff= IRA+ IRBReff= RA+ RBI = IA+ IBΔVReff=ΔVRA+ΔVRB1Reff=1RA+1RBA B A B 5/25/10 16 Physics 122Physics 122 4/27/11 Prof. E. F. Redish 5 4/27/11 17 Physics 122 How do the currents in resistors A and B compare? How do the voltage drops across resistors A and B compare? How does the current in and voltage drop across resistor C compare to those in A and B? Find the current in resistor D. (R) (R) (2R) (3R) (V0) I0 = V0 /R 4/27/11 18 Physics
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