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3. A proton is released at point P with an initial velocity of 1 x 105 m/s directed to the right, as
shown in the figure below. The magnetic field is directed into the page.
X
X
X
X X
X
B
X
X
X
X
X
X
X
X
X
X
X
х х х х х х
a. Determine the magnitude and direction of the force on the proton.
b. Describe qualitatively the path followed by the proton. Sketch the path of the proton
on the diagram.
c. Determine the radius of orbit of the proton.
PO
X
X

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