This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: Problems on Chapter 28 1. A particle of mass 0.195 g carries a charge of – 2.50 x 10 -8 C. The particle is given an initial horizontal velocity that is due north and has magnitude 4.00 x 10 4 m/s. What are the magnitude and direction of the minimum magnetic field that will keep the particle moving in the Earth’s gravitational field in the same horizontal, northward direction? 2. An electron experiences a magnetic force of magnitude 4.60 x 10-15 N when moving at an angle of 60.0° with respect to a magnetic field of magnitude 3.50 x 10-3 T. Find the speed of the electron. 3. The magnetic field ? ⃗ in a certain region is 0.18 T and its direction is that of the + z-axis in the figure. a) What is the magnetic flux across the surface abcd ? b) What is the magnetic flux across the surface befc ? c) What is the magnetic flux across the surface aefd ? d) What is the net flux through all five surfaces that enclose the volume? 4. A 150-g ball containing 4.00 x 10 8 excess electrons is dropped into a 125-m vertical shaft. At the bottom of the shaft, the ball suddenly enters a uniform horizontal magnetic field that has magnitude 0.250 T and direction from east to west. If air resistance is negligibly small, find the magnitude and direction of the force that this magnetic field exerts west....
View Full Document