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.
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.
举一反三
- 1. A charged particle is traveling through a uniform magnetic field. Which of the following statements are true of the magnetic field? A: It exerts a force on the particle parallel to the field. B: It exerts a force on the particle along the direction of its motion. C: It increases the kinetic energy of the particle. D: It exerts a force that is perpendicular to the direction of motion.
- (<br/>) can be determined by the left hand rule. A: The induced force on the moving charged particles in the magnetic<br/>field. B: The direction of the induced force on the moving charged particles in<br/>the magnetic field. C: The induced electromagneto motive force on the moving conductor in<br/>the magnetic field. D: The direction of the induced electro-motive force on the moving<br/>conductor in the magnetic field.
- <p><p>1. A charged particle is traveling through a uniform magnetic field. Which of the following statements are true of the magnetic field? </p></p>
- 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
- If the magnetic field B through<br/>a loop of wire is increasing, the<br/>induced magnetic field will be A: in<br/>the same direction as B B: in<br/>the opposite direction as B C: perpendicular<br/>to B D: at<br/>an acute angle to B E: there<br/>is no induced magnetic field