Physics

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An electron and a proton execute uniform circular motion in the presence of a uniform magnetic field.

If the radius of the circle is the same for both particles, which of the following statements is true?

a. Both particles move in the same direction; the electron moves faster than the proton.
b. Both particles move in the same direction; the proton moves faster than the electron.
c. The electron and the proton move in opposite directions but they move with the same speed.

d. The electron and the proton move in opposite directions; the electron moves faster than the proton.

e. The electron and the proton move in opposite directions; the proton moves faster than the electron.

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