Question
Magnetic field
The equation for the Lorentz force is F=qvxB. Which of the following statements is true? F B only F v only v B (D) F v and F B A moving charge feels no Lorentz force on it when it goes through a magnetic field if the charge: moves in a circle. moves in the same direction as B. moves at right angles to B. is an electron. An electron moves with velocity v. Which of the following figures is not correct? What is the direction of the magnetic field between your Helmholtz coils? Pointing outward. Pointing inward. Pointing up. In the same circular loop as the electrons travel. How will the electrons travel if you rotate the bulb in your e/m apparatus? Still in a circle. They will disperse in all directions. In an irregular path. In a helical path. If you increase the magnetic field between the Helmholtz coils, how will the circular path of the electrons change? The circle will become bigger. The circle will become smaller. It does not change. It becomes a straight line. If you increase the accelerating voltage on the electrons, how will the trace of electrons change? The circle will become bigger. The circle will become smaller. It does not change.
Explanation / Answer
1) D
2) B
3) A
4) C
5) A
6) B
7) A
