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.
举一反三
- 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.
- <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>
- (<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.
- It is found more convenient to adopt the point of view that a moving charge sets up a magnetic field, _____ that this field exerts a force on another charge moving through it. A: and B: or C: that D: but
- Which of the following statement is not true？ A: It is a quantum particle, behaving in some experiments like a classical particle and in some experiments like a classical wave. B: Its rest energy is zero. C: It carries energy in its motion. D: It carries momentum in its motion.
内容
- 0
A particle is subjected to forces of [img=18x22]1803a46e41745d3.png[/img], [img=18x22]1803a46e4a7b58d.png[/img], ¼ and [img=20x22]1803a46e54cefd0.png[/img], and the resultant of these forces is [img=78x36]1803a46e5d7bb8f.png[/img]. Which statement is correct? A: The moving direction of the particle must be the same as that of the resultant force [img=14x19]1803a46e65bb7b5.png[/img]. B: The greater the resultant force [img=14x19]1803a46e6dfa97e.png[/img], the greater the speed of the particle. C: The greater the resultant force [img=14x19]1803a46e772e05b.png[/img], the greater the acceleration of the particle. D: The acceleration direction of the particle may or may not be the same as that of the resultant force [img=14x19]1803a46e772e05b.png[/img].
- 1
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
- 2
What is the net force on a magnetic dipole in a uniform magnetic field [img=14x24]1803a3749667c37.png[/img]? A: Nonzero and in the direction of [img=14x24]1803a3749f40258.png[/img]. B: Nonzero and in the direction of [img=28x26]1803a374a7784ea.png[/img]. C: Nonzero and perpendicular to [img=14x24]1803a3749f40258.png[/img].[img=14x24]1803a3749f40258.png[/img] D: zero.
- 3
An inductor stores energy in a magnetic field _________ an electric field.
- 4
can be determined by the leT hand rule. A: The direc2on of the induced force on the moving charged par2cles in the magne2c field. B: The direc2on of the induced electro-mo2ve force on the moving conductor in the magne2c field C: The induced force on the moving charged par2cles in the magne2c field. D: The induced electromagneto mo2ve force on the moving conductor in the magne2c field.