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\fA thin circular sheet of glass of diameter 8 meters is rubbed with a cloth on one surface, and beocrnes charged uniformly. A chloride ion (a chlorine atom which has gained one extra electron] passes near the glass sheet. When the chloride ion is near Ihe center of the sheet, ai a location 0.9 mm from the sheet, it experiences an electric force or Elesl N, toward the glass sheet. in Ihis problem, use the value cc. = 5.35am cllcuimzj It Wlll be useful to you to draw a diagram on paper. shouting held vectors, force vectors, and charges, before answering the following questions about this situation. (a) which of the following statements about this situation are correct? Select all that apply. D The force on the chloride ion is equal to the electric field of the glass sheet. l] The net electric field at the location ofthe chloride ion is zero. l] The eleclric field that acts on the chloride ion is due to Ihe charge on the glass sheet and to the charge on the chloride ion. D The charged disk is the source of the electric field that causes the force on the chloride ion. D The eleclric field of the glass sheet is equal to the electric eld of Ihe chloride ion. (in) In addition to an exact formula for the electric eld of a disk. the textbook derives two approximate formulas. In the current situation we warit an answer that is correct to 3 significant figures. Which of the folloWing is correct? 0 z is nearly- equal to R, so we have to use the exact formula. O 2 > 2, so it is adequate to use the most approximate formula here. 0 We should never use an approximation if We have enough information io do an exacl calculation. (c) How much charge is on the surface of the glass olisk:l (give amount. including sign, arid correct units) unils'? v