Velocity Selector A proton enters a space in which there are both electric and magnetic fields. The electric field points vertically upward and the strength is 7.70x105 V/m. The magnetic field points horizontally to the right and the strength is 1.00 T. The proton enters with a velocity vector that is perpendicular to both the electric and magnetic fields, and the magnetic force is opposite to the electric force. Determine the proton speed such that the proton will pass through the space with no deflection, i.e., with a constant velocity vector.
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- A 68.0-cm-diameter cyclotron uses a 450 V oscillating potential difference between the dees. Part A What is the maximum kinetic energy of a proton if the magnetic field strength is 0.740 T? Express your answer with the appropriate units. Value Submit Part B μA Submit Units Request Answer IV—| ΑΣΦ 3 How many revolutions does the proton make before leaving the cyclotron? ? Request Answer ?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…An electron travels with speed 1.3×107 m/s between the two parallel charged plates shown in the figure. The plates are separated by 1.0 cm and are charged by a 200 V battery. Part A What magnetic field strength will allow the electron to pass between the plates without being deflected?Express your answer in tesla. Part B What is the direction of the magnetic field?A UpB DownC Out of the pageD Into the page
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