PhysicsHardHigh School (11–12)Electricity & Magnetism › Magnetic Effects of CurrentBoard ExamAPA-LevelIB
Created by StemPy LabA proton and an alpha particle start from rest and are sped up through the same voltage. Then each enters the same uniform field at right angles. An alpha particle has twice the charge and four times the mass of a proton. What is the ratio of the radius of the alpha circle to that of the proton circle?
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← A student says: "A proton that moves faster takes less time to go once round its circle in the same field." What is wrong with this statement?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? →
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