17_InstSolManual_PDF_Part17

17_InstSolManual_PDF_Part17 - Electric Charge and Electric...

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17.50. Set Up: The proton has charge and the electron has charge The electric field of a point charge is directed away from the charge if it is positive and toward the point charge if it is negative. Use coordinates where the x axis is along line ABC and the direction is toward C and where the direction is toward the proton. The electric fields due to each charge at A, B and C are sketched in Figure 17.50. Figure 17.50 Solve: (a) At point A the x components of the fields cancel and the net field is in the direction. (b) At B both fields are in the direction and the net field is in the direction. (c) At C, as at A, the x component of the fields cancel and the net field is in the direction. 17.51. Set Up: Electric field is away from positive charge and toward negative charge. Figure 17.51 Solve: (a) The electric fields
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