PhysicsMediumHigh School (11–12)Electricity & Magnetism › Magnetic Effects of CurrentBoard ExamAPA-LevelIB
Created by StemPy LabTwo parallel plates cm apart have a voltage of V between them. A magnetic field of T acts at right angles to the electric field and to the beam. At what speed does a charged particle go straight?
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← A positron has the mass of an electron and the charge of a proton. It enters a uniform field of 0.85 mT with a speed of 3.0 × 10⁶ m/s, at 30° to the field. How far along the field does it move in one turn of its helix?Assertion (A): A magnetic field can change the direction of the velocity of a charged particle but not its speed. Reason (R): The magnetic force on a moving charge is always at right angles to its velocity. →
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