Q5 of 32 Page 98

A uniform magnetic field exists in the plane of paper pointing from left to right as shown in Figure 13.3. In the field, an electron and a proton move as shown. The electron and the proton experience

The electron and proton experiences forces pointing into the plane of the paper and out of the plane of the paper because the direction of current will be opposite to the direction of electrons and in the direction of protons. As shown in the figure, the direction of electrons and protons is in opposite directions and perpendicular to the direction of the magnetic field. Therefore, the forces acting on electron and proton will be in same direction. Fleming’s left-hand rule can be applied and the direction will be into the plane of paper.

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