Giancoli 5th Ed.

Hwk 7            5 point hwk
Ch. 26 P. 1,2,5,7,12,17,31

Ch. 26  Problems: 
1. a) Vab=5.91 V
   b) Vab=5.99 V
2. Vab = 4(emf - Ir) = IR
      r = [emf - (IR/4)h]/I  = 0.2 ohm
5. V=IR_2  where I=emf/(R_1+R_2)
   V=8.6 V
7. R_eq = (5/100)^{-1} = 20 ohms = n(10 ohms) 
   so n=2
12. a) V = IR = (Vtot/8R)R = Vtot/8 = 120 / 8 = 15 V
    b) R=V_tot/8I = 23 ohms  and P=I^2R =9.8 W
17. a) R_eq = 588 ohms
    b) I_tot = V/R_eq = .0851 A
       I = .0624 A through left-most vertical resistor
31. Use loop rules and junction rule to
    find I1=-0.8026 A
         I2=2.308 A
         I3=1.506 A
    a) V_ad = -27 V
    b) V_term = 83 V
       V_term = 43 V


Please check   Tot= 5 pts
Prob.  12