内容发布更新时间 : 2024/6/7 21:43:35星期一 下面是文章的全部内容请认真阅读。
第九章
9.1 (1) D (2) B
q?39.2 (1) (2) i q23 2??0a?a?b?b9.4 ln,arctan2??02??02h
9.12 13.6 eV
9.14 等势线是中垂面内半径为x的圆，圆心在两电荷连线的中点
?R3?R2?9.16 ,,(3R2?r2)
3?0r3?06?0?2?R2?R2R9.18 ?r(r?R),??ln(r?R)
4?04?02?0r9.20
111(??)(r?R1)，4??0rR1R2qq4??0R2(R1?r?R2)，q4??0r(r?R2)
9.24 0
1?0Sd?29.26 ,U02d?d?2(d?d?)?0S9.28 2??0R1R2U2
R2?R1
9.30 ?1.0?10?7C,?2.0?10?7C,2.3?103V,?7?82 ?2.1?10C,?8.6?10C,9.7?10V
9.32 0，0；3.5?10-8 C/m2，8.0?102 N/C；1.3?10-8 C/m2，1.4?103 N/C；
5.4?102 V；4.8?102 V；3.6?102 V 9.34 2.7?10-5 C/m2 9.36 (1)
U0?0SU?U0?0?rS (2) 00, (3) dd?rd?rd?(1??r)t第十章
10.1 (1) B (2) D (3) D (4) B (5) C
?0NI?0NIhD1?0I2aIBa22(2ln3?1) (2) 10.2 (1) (3)?,ln,0,IBa2 ?242?r2?D2 (4) IBR (5) 2.86?1014 m-3，n (6) ?6A，12A，15A，?3A
?I10.4 0.210
r 1
???0a?b??ln,[(a?b)3?a3] 4?a6?0Ir?0I?0I(r32?r2)10.8 (r?r1),(r1?r?r2),(r2?r?r3),0(r?r3) 2222?r2?r12?(r3?r2)r10.6
10.10 0.41(A)，方向向右
??0I2??R10.12 F?2j,?
2?Ra??b???0I1I2?2a3?ln?10.13 ?a2??33? b?6?a?236???10.14 1.32?10-2 T，静止在垂直位置不偏转 10.16
1?QR2Bcos?4
10.18 5.57?106 m/s
10.20 (1) 2.5?10-4 T，200A/m (2) 1.05 T，200A/m
第十一章
11.1 (1) C (2) A、C (3) (a) (4) 曲线acb、直线 ab (5) A、D 11.2 (1) vBl cos?，vBl(1? cos? ) (2) ?222vBl,21?Bl2 2 (3)
BlvBl12 ,向左,v0e,v0e,mv0mRR2?b?0b?I0e??tln3(4) 0ln3,(5) 1.5 ?108 N/C
2?2?
??B2l2tmRB2l2tmR11.4 5.7?10-5 Wb 11.5 5.7?10-3 V 11.6 0.4 V，2.0?105 A
mgR 22BL?0Iv1l1?Ivld?v1t?011ln11.10
2?(d?v1t)2?l2d?l2?v1t11.11 2.5 ?10-3 N/C，3.3 ?10-3 N/C
11.8
11.12 (1) 7.1?10-3 V/m，5?10-3 V/m (2) 2?10-3 V，沿dca方向 11.14 1.55 ?10-5 C
2
11.16 (1)
?0N12a22R2R2R?al?bl2?Ia?l?bl211.18 (1) 0ln(1?) (2) ?00cos?t?ln(1?)
2?l1l2?b2?l1l2?b,22?0N2a (2)
?0N1N2a2 (3) M?L1L2
?0I2r2?0I2(r?a),(a?r?b),11.20 (1)
8?2a48?2r2
?0I2c2?r22 ()(b?r?c),0(r?c)8?2r2c2?b2 (2) 1.7?10-5 J/m
第十二章
12.1 (1) D (2) C (3) A (4) A、C (5)D
2?, CD (2) 0.233 Cxx(b)y?Acos[?(t?)??] (3) (a)y?Acos[?(t?)??]uux?lx?l[(t?)??](d)y?Acos?[(t?)??] (c)y?Acos?uu3xx? (5) y2?Acos[2?(?t?)??],y3?Acos[2?(?t?)] (4) ?,2??tx3)??] ?0.8? cm/s12.4 2 cm/s y?4?10?2cos[2?(?
100.22
12.6 10.5 cm、5Hz、52.5 cm/s、0.2s
B,C2?,B12.2 (1) A,
12.8 y?1.0?10?2cos2?(400t?x)(m) 12.10 (1)y?6.0?10?2cos(?512.12 0.5m、2.5m/s、0.92s
tx12.14 y?4cos2?(?)(m)
41612.16 y?0.1cos(4?t??)(m),?0.4?(m/s)
t?3?3?)(m) (2) ???
5512.18 5.3?10-5 J/m3、10.6?10-5 J/m3、4.7?10-7 J/m3 12.20 ?3?、0 12.22 P点干涉相消 12.24 2.00?10-3 m 12.26 (1) y2?Acos[2?( (3) 波腹：x?k
tx2?xt?)] (2) y?2Acoscos2? T??T?2(k?0,1,2,?) 波节：x?(2k?1)?4(k?0,1,2,?)
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