If a charged particle is moving in a uniform magnetic field, its path can be:
a. a straight line.
c. a helix.
b. a circle.
d. any of these choices.
D
You might also like to view...
Equilibrium: Two blocks, A and B, are being pulled to the right along a horizontal surface by a horizontal 100-N pull, as shown in the figure. Both of them are moving together at a constant velocity of 2.0 m/s to the right, and both weigh the same. 
Which of the figures below shows a correct free-body diagram of the horizontal forces acting on the lower block, B?
A. 
B. 
C. 
D. 
E. None of these diagrams is correct.
A car starting from rest moves with constant acceleration of 2 m/s2 for 10 s, then travels with constant speed for another 10 s, and then finally slows to a stop with constant acceleration of -2 m/s2. How far does it travel?
A) 400 m B) 100 m C) 500 m D) 300 m E) 200 m
A metal surface has a work function of 2.50 eV. What is the longest wavelength of light that will eject electrons from the surface of this metal? (1 eV = 1.60 × 10-19 J, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s)
What will be an ideal response?
What two facts did Newton need to be able to calculate the acceleration of the Moon?
a. The distance to the Moon and the diameter of the Moon. b. The time it takes the Moon to make one revolution and the distance from the Earth to the sun. c. The diameter of the Moon and the speed of the Moon's rotation. d. The diameter of the Moon and the diameter of Earth. e. The distance to the Moon and the time it takes the Moon to make one revolution.