1.磁场、磁感线(答案)

A
C

2.安培定则(答案)

略
BC
C
A
A

3.磁感应强度和安培力(答案)

C
略
B
B

(1)0

(2)0.2

(3)0

(4)0.2

4.左手定则(答案)

BCD
A
D
A
C
A
BC
A
C

5.安培力计算(答案)

(1)80000N

(2)20m

BC
A
A
D
B
D
BD
B

(1)\(x\sqrt{\frac{g}{2h}}\)

(2)\(\frac{MX}{BL}\sqrt{\frac{g}{2h}}\)

(1)\(4A\)

(2)\(0.25T\)

D

(1)\(mgsin\theta\)

(2)\(\frac{Mgsin\theta(R+r)}{Bl}\)

CD
C

6.磁场叠加问题(答案)

【题型特征】C
【题型特征】B
C
B
D
AC
AC
A
BD
B
C
A

7.环形电流问题(答案)

【题型特征】C
C
A

8.洛伦兹力(答案)

D
C
B
D
D

9.带电粒子在匀强磁场中的运动(答案)

AD
D
B
AC
A

10.磁场轨迹问题(答案)

AD
AD
AD
AD
BD
C
AC
C
B
B

\(\frac{mv_{0}}{2qd}\),\(\frac{\pi d}{3v_0}\)

AC

11.弦长公式(答案)

【题型特征】A
A
AC
AC
A
B
AC

12.磁场临界问题—放缩圆(答案)

A
D
C
AB
BC
C
C
C

13.磁场临界问题—旋转圆(答案)

【题型特征】C
C
C
B
C

14.圆形磁场最小面积问题(答案)

【题型特征】

\(\frac{3\pi m^{2}v_{0}^{2}}{4q^{2}B^{2}}\)

C

\(\frac{3\pi m^{2}v_{0}^{2}}{4q^{2}B^{2}}\)

15.叠加场中的直线和圆周运动(答案)

C
C
D
B
B

(1)\(\frac{2E}{B}\)

(2)\(\sqrt{3}E\),向上

(3)\(\frac{4\sqrt{3}\pi E}{3gB}\)

16.速度选择器、磁流体发电机和电磁流量计(答案)

【题型特征】BC
B
BC
B

(1)\(\frac{VBds}{RS+\rho d}\),向上

(2)\(\frac{VBdsR}{RS+\rho d}\)

D
AC

17.霍尔效应(答案)

【题型特征】

(1)\(c\)

(2)\(U_{\mathrm{H}}=E_{H}\cdot l\)

AB
C
C
AD
D

(1)\(c\)

(2)\(U_{\mathrm{H}}=E_{H}\cdot l\)

(3)\(\frac1{ne}\)

18.质谱仪(答案)

【题型特征】D
D
AC
BC

(1)\(\frac{4v}{v_{1}l}\)

(2)\(\frac{1}{4}\)

(1)\(\sqrt{\frac{2EqL}{m}}\)

(2)\(\frac1r\sqrt{\frac{2mEL}{3q}}\)

(3)\(\sqrt{\frac{2mL}{qE}}+\frac{\pi mr}{\sqrt{6mqEL}}\)

19.回旋加速器(答案)

【题型特征】BC
BC
BD
B

(1)\(\frac{1}{2}\)

(2)\(0.5V\)

(3)\(E_k\)

C
ACD
AC

20.类平抛电场+磁场(答案)

【题型特征】

(1)2\(v_0\)与\(x\)正方向夹角\(60^o\)

(2)\(\frac{\sqrt{3}mv_{0}}{qL}\)

(1)2\(v_0\)与\(x\)正方向夹角\(60^o\)

(2)\(\frac{\sqrt{3}mv_{0}}{qL}\)

(1)\(v_{0}\sqrt{\frac{2mh}{Eq}}\)

(2)\(\frac{2}{B}\sqrt{\frac{2hEm}q}\)

(1)\(\sqrt{2}v_0\)与\(x\)正方向夹角\(45^o\)

(2)\(\frac{v_0}{2}\)

(1)\(\frac{mv_0^2}{2qh}\)

(2)\(\sqrt{2}v_0\)与\(x\)正方向夹角\(45^o\)

(3)\(\frac{2mv_0}{qL}\)

(1)\(6L\)

(2)\((1+\frac{\sqrt{3}}{2}\pi)\sqrt{\frac{2Lm}{Eq}}\)