A
beam of electrons enters a magnetic field. Which of the following
best describes their motion?
A: They
continue in a straight line.
B: They
are bent toward Magnetic North.
C: They
exhibit circular motion in the counterclockwise direction.
D: They
exhibit circular motion in the clockwise direction.
E: Not
enough information is given.
beam of electrons enters a magnetic field. Which of the following
best describes their motion?
A: They
continue in a straight line.
B: They
are bent toward Magnetic North.
C: They
exhibit circular motion in the counterclockwise direction.
D: They
exhibit circular motion in the clockwise direction.
E: Not
enough information is given.
举一反三
- 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
- (<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.
- Semiconductor<br/>with a current is placed in a magnetic field perpendicular to the<br/>current and it induced electric field in the direction. This<br/>phenomenon is known as the ______ .
- 中国大学MOOC: A uniform circular motion on xoy plane can be treated as the superposition of a simple harmonic motion in x direction and another simple harmonic motion in y direction.