Brittney Alec Brittney runs past Alec while holding a positive charge q. In Alec's reference frame, there is no field. both an electric and a magnetic field. only an electric field. only a magnetic field.

Q2) A particle of mass 6.00 x 108 kg and charge of -7.20 mC is travelling due east. It enters a uniform magnetic field of 3.00 T that points downwards. After entering the field, the particle completes one-half of a circle and exist the field travelling due west. How much time does the particle spend travelling in the magnetic field?

003 An electron in a vacuum is first accelerated by a voltage of 11000 V and then enters a region in which there is a uniform magnetic field of 0.315 T at right angles to the direction of the electron's motion. The mass of the electron is 9.11 x 10 kg and its charge is 1.60218 x 10- C. What is the magnitude of the force on the electron due to the magnetic field? Answer in units of N. 31 19

Physics 212 - Module 5 Hands On Activities Packet 2. A mass spectrometer is used to determine the mass of the ions in a sample. Once the mass of the ions are known one can determine what molecular composition of the sample. The Behrend chemistry department has several mass spectrometers. A new singly charged ion (the sign of the charge is unknown but we know it is either te or-e) enters a velocity selector as shown with crossed electric and magnetic fields of magnitude E and B. Only ions with the selected speed then leave through the right hole and enter a region with the same magnetic field B but no electric field. The magnetic force then causes the charges to move in a semi-circular path of radius r as shown. By measuring r one can determine the mass of the ions. a. Is the ion positive or negative? • 8 times as large • a factor of √2 as large • 1/2 as large b. Determine the mass of the ion in terms of e, B, E and/or r. Show work. Note: your answer should not contain the speed v. .8…