Chapter 27- College Physics, 7th ed. (Sears, Zemansky, Young)

 

27-1.        ?

27-2.        a) 1.00 x 104 V       b) 2.26 x 10-3 m2                     c) 8.00 x 10-12 F

27-3.        a) 400V                   b) 3.39 x 10-2 m2                     c) 6.67 x 105 V/m                    d) 5.9 x 10-6 C/m2

27-4.        3.60 x 10-4 C

27-5.        a) Q1 = 1.15 x 10-4 C; Q2 = 1.15 x 10-4 C               b) V1 = 28.8 V; V2 = 19.2 V

27-6.        a) Q1 = 1.92 x 10-4 C; Q2 = 2.88 x 10-4 C               b) V1 = 48.0 v: V2 = 48.0 V

27-7.            a) Q1 = 4.32 x 10-5 C; Q2 = 8.64 x 10-5 C; Q3 = 1.30 x 10-4C

b) V1 = 21.6 V; V2= 21.6 V; V3 = 14.4 V               c) 21.6V

27-8.        a) Q1 = 9.60 mC; Q2 9.60 mC; Q3 = 19.2 mC; Q4 = 28.8 mC

b) V1 = 4.8 V; V2 = 4.8 V; V3 = 9.6 V; V4 = 14.4 V

c) 9.60 V

27-9.         2.16 J

27-10.          0.0173 J/m3

27-11.         a) 7.50 x 10-11 F                      b) 0.0148 m2           c) 1.50 x 10-6 J        d) 1.40 x 103 V

27-12.          a) 143 V b) 3.57 x 10-7 J        c) 0.0119 m2           d) 2.40 x 103 V

27-13.         a) 4.00 x 103 V        b) 8.00 x 103 V        c) 8.00 x 10-3 J

27-14.          a) 0.016 C              b) 533 V                  c) 4.27 J                  d) 2.13 J

27-15.         ?

27-16.          0.0106 m2

27-17.         a) 0.723 m2             b) 2.00 x 103 V

27-18.          a) 1.42 x 10-6 C/m2                b) 2.33

27-19.         a) 1.12 x 10-4 C/m2 b) 8.68 x 10-5 C/m2

27-20.          a) 6.16                    b) 1.51 x 10-7 C

27-21.         a) 4.43 x 10-11F       b) 5.31 x 10-9 C       c) 1.50 x 104 V/m                    d) 3.19 x 10-7 J

e)       (a) 2.21 x 10-11 F; (b) 5.31 x 10-9 C; ( c) 1.50 x 104 V/m; (d) 6.37 x 10-7 J

27-22.      a) 2.21 x 10-11 F                      b) 2.66 x 10-9 C                       c) 7.5 x 103 V/m                      d) 1.59 x 10-7 J

27-23.  see back of book

27-24.  a) two in parallel in series with two in parallel, or two in series in parallel with two in series

b) dielectric breakdown in one of the other capacitors

27-25.  a) 2.00mF     b) Q3 = 1.80 x 10-3 C; Q2 = 1.20 x 10-3 C              c) 100 V

27-26.  a) 2 mF: 2.4 x 10-3 C; 1200 V and              3 mF: 3.6 x 10-3 C; 1200 V

b) 2 mF: 4.8 x 10-4 C; 240V and 3 mF: 7.2 x 10-4 C; 240 V

27-27.  a) 2 mF: 1.44 x 10-3 C; 720 V and 3 mF: 1.44 x 10-3 C; 480 V

b) 2 mF: 1.15 x 10-3 C; 576 V and 3mF: 1.73 x 10-3 C; 576 V

27-28.      a) 9.6 x 10-5 C        b) 2.3 x 10-3 J          c) 14.4 V d) 2.07 x 10-3 J

27-29.   2.30 x 10-3 J

27-30.   ?

27-31.  see back of book

27-32.   a) 3.54 x 10-11 F                          b) 1.06 x 10-8 C       c) 1.59 x 10-6 J        d) 0.498 J/m3

27-33.  ?

27-34.   a) 66.7 V     b) 100 V for each                  c) 3.00 x 10-4 C

27-35.  9.44 x 10-10 F

27-36.      a) Keff = 1 + h(K –1)/l           b) ¼ full: 1.24, ½ full: 1.48, ¾ full: 1.71             

c) ¼ full: 9.0, ½ full: 17.0, ¾ full: 25.0 d) methanol