磁场中某点的磁感应强度的方向（ ）Direction of magnetic flux density at a point is ( )
A: 放在该点的通电直导线所受的磁场力的方向The direction of the magnetic force on the current-carrying placed at this point
B: 放在该点的正检验电荷所受的磁场力的方向The direction of the magnetic force on the positive charge placed at this point
C: 放在该点的小磁针静止时N极所指的方向The direction of N pole when the small magnetic needle placed at this point is stationary
D: 通过该点磁场线的切线方向Tangent direction of magnetic field line at this point
A: 放在该点的通电直导线所受的磁场力的方向The direction of the magnetic force on the current-carrying placed at this point
B: 放在该点的正检验电荷所受的磁场力的方向The direction of the magnetic force on the positive charge placed at this point
C: 放在该点的小磁针静止时N极所指的方向The direction of N pole when the small magnetic needle placed at this point is stationary
D: 通过该点磁场线的切线方向Tangent direction of magnetic field line at this point
举一反三
- 磁场中某点的磁感应强度的方向 （ ） A: 放在该点的通电直导线所受的磁场力的方向 B: 放在该点的正检验电荷所受的磁场力的方向 C: 放在该点的小磁针静止时N极所指的方向 D: 通过该点磁场线的切线方向
- The<br/>magnetic field lines are used to visually describe the distribution<br/>of the magnetic field around the magnet. For the following<br/>statement,( <br/>) is wrong. A: Each<br/>magnetic field line is a closed loop curve B: No<br/>two magnetic field lines can cross each other C: The<br/>length of the magnetic field line reflects the strength of the<br/>magnetic field D: The<br/>tangential direction of any point on any of the magnetic lines is the<br/>direction of the magnetic field at that point
- Which of the following explains why a magnetic field does no work on a moving charged particle?( ) A: The magnetic force depends on the speed of the particle. B: There is always an electric field that cancels the work done by the magnetic field. C: The magnetic force is always perpendicular to the direction of motion. D: The magnetic force depends on the direction of motion of the particle. E: The magnetic force is conservative.
- 磁场中任一点的磁场方向,是指小磁针在磁场中()。 A: 受磁场力的方向 B: N极所受磁场力的方向 C: S极所受磁场力的方向 D: N极所指的方向
- 下列关于磁感应强度的方向的说法中正确的是（） A: 某处磁感应强度的方向就是一小段通电导体放在该处时所受磁场力的方向 B: 小磁针N极受磁力的方向就是该处磁感应强度的方向 C: 垂直于磁场放置的通电导线的受力方向就是磁感应强度的方向 D: 磁场中某点的磁感应强度的方向简称该点的磁场方向