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单选题 如图一通有0.75 A电流的导线被弯成半径为0.5 m的1/4圆弧,放在磁感强度为1.2 T的均匀磁场中,则载流导线ab所受磁场的作用力的大小为: 
学科：2023年春季学期-大学物理1
时间：2023-06-13 11:24:34
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题目1单选题
如图所示,半径为R的均匀带电球面,总电荷为Q,设无穷远处的电势为零,则球内距离球心为r的P点处的电场强度的大小和电势为: <img src="https://tihai-oss-cloud.itihey.com/img/759d16f2d0deafc8ecf38c46c5b12b3f.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/b82d05fee7072c9b16335e7e6194c089.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/83c345e37cbcdc26f14713aba9163f64.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/5f07252711a737c056c2b2a7d5fee92f.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/05a343faa3871ae301a8db6ac0242997.png">
题目2单选题
如图一通有0.75 A电流的导线被弯成半径为0.5 m的1/4圆弧,放在磁感强度为1.2 T的均匀磁场中,则载流导线ab所受磁场的作用力的大小为: <img src="https://tihai-oss-cloud.itihey.com/img/868ef1c4857c6482da7c7f675b7fb554.png">A. 1.28 NB. 0.32NC. 0.64 ND. 0.16 N
题目3单选题
一电场强度E的均匀电场,E的方向与沿x轴正向,如图所示.则通过图中一半径为R的闭合半球面的电场强度通量为: <img src="https://tihai-oss-cloud.itihey.com/img/779d3ec66f66bc2a8e16565f65f891f0.png">A. 2πER2B. πER2/2C. πER2D. 0
题目4单选题
一半径为R的均匀带电球面,其电荷面密度为σ.若规定无穷远处为电势零点,则该球面上的电势U为A. <img src="https://tihai-oss-cloud.itihey.com/img/0859b0e7015f6a3ffb83d1e5c3c48fa3.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/cb6eaf146ddc9994995213a447c2ac5b.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/2a878e71867ffb6e0b0c29a532ba5062.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/7b7b9264d1fb44568aff751e6a076299.png">
题目5单选题
<img src="https://tihai-oss-cloud.itihey.com/img/7d1f3a6a1bcfb5c104006f77ccfc6559.png"> <img src="https://tihai-oss-cloud.itihey.com/img/c483b526276d43c1461b92506cebad70.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/f9d3df084da0d4fff2fe21963afebbf8.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/06e7081950ecc6d85393e407136cea8e.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/ea4ab968812661d91210b96b1eb554d3.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/10d63c79425a60effa5c9c46d29e9dfa.png">
题目6单选题
如图所示,一条无限长直导线载有电流I,在离它d远的地方的长b宽l的矩形框内穿过的磁通量为 <img src="https://tihai-oss-cloud.itihey.com/img/1e8b72535c0661f504173a4ca3437743.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/39187fc94f900f283d227595ee212819.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/7db78ae5814116e84987ce9c348c64a8.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/66f117d95a12f86896bfabf91ff307d3.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/a7ea8402775c96cbfd5d72ca97e2ae8e.png">
题目7单选题
半径为r的均匀带电球面1,带有电荷q,其外有一同心的半径为R的均匀带电球面2,带有电荷Q,则此两球面之间的电势差为A. <img src="https://tihai-oss-cloud.itihey.com/img/bff2b0230972ab139d531e642b8ae9ec.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/6d61bb3ce82224f464a16f2dc6226bf3.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/c869381d23916011f152b09d2060978c.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/dee7c98d49ab0d631cf739b505600cb4.png">
题目8单选题
如图所示,用均匀细金属丝构成一半径为R的圆环 C,电流I由导线1流入圆环A点,并由圆环B点流入导线2.设导线1和导线2与圆环共面,则环心O处的磁感强度大小为______,方向__________. <img src="https://tihai-oss-cloud.itihey.com/img/4a31e0a8ba73aa3d17a25da541f54b33.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/542f26f1ce2f8c210233207243de8374.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/40e9f6d0ccc98ca970816bc1b6ae8f16.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/04828aa532ff13febb62bafd39df6544.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/8e0dcb941fd729454888063ac54a6670.png">
题目9单选题
如图所示.试验电荷q,在点电荷+Q产生的电场中,沿半径为R的整个圆弧的3/4圆弧轨道由a点移到d点的过程中电场力作功为 <img src="https://tihai-oss-cloud.itihey.com/img/ffb9cb6c7c6c6f5cd3ed79ea951f3e1e.png">A. 0B. <img src="https://tihai-oss-cloud.itihey.com/img/fe83253011e2b836b0e389573ce374be.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/66c18d07c712fc3712d93d3b57cef3d7.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/4380ca38b63d8b96c5f44ec7168e5f2a.png">
题目10单选题
两同心导体球壳,内球壳带电荷+q,外球壳带电荷-2q.静电平衡时,外球壳内表面和外表面电荷分布分别为: <img src="https://tihai-oss-cloud.itihey.com/img/60d19f06822353617c1592a22544fbd9.png">A. q,-3qB. -q,-qC. -q,-2qD. q,-q
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