In an ionic solution, a current consists of Ca2+ ions (of charge +28} and Cl- ions (of charge e) traveling in opposite directions. 7.11X1O18 01' ions go from A to B every 0.70 min, while 4.24X1 t]1B Ca2+ ions move from Bio A. V PartA What is the current (in mA) through this solution? Express your answer in milliamperes. IEVEAMW Review | Con What is the potential difference across a 2.00 m length of the wire? A 14 gauge copper wire of diameter 1.628 mm Express your answer in volts. carries a current of 13.0 mA. Pcopper = 1.72 x 10-8 0 . m. AEd ? V = V Submit Request Answer Part B What would the potential difference in part A be if the wire were silver instead of copper, but all else was the same? Psilver = 1.47 x 10-8 0 . m. Express your answer in volts. VO AEd ? V = VReview | Con Part A A wire 6.50 m long with diameter of 1.80 mm has a resistance of 0.0330 0 For related problem-solving tips and strategies, you Find the resistivity of the material of the wire. may want to view a Video Tutor Solution of Express your answer in ohm-meters. Resistance in your stereo system. IVO AEd ? p= n . m Submit Request Answer Provide FeedbackPart A What diameter must a copper wire have if its resistance is to be the same as that of an equal length of aluminum wire with diameter 3.36 mm ? Express your answer in millimeters. ? d = mm Submit Request Answer Provide FeedbackPart A A steel wire of length _ and radius m1 has a resistance R. A second steel wire has the same length but a radius 72 and a resistance of 3R. Find the ratio r1 /12. Express your answer to three significant figures. ? = Submit Request AnswerPart A Learning Goal: To understand the role of the internal resistance of What is the reading V of the voltmeter? various devices and the use of the ammeter and the Express your answer in terms of the EMF E. voltmeter. Consider the circuit shown. (Figure 1) All wires are considered ideal; that is, they have zero resistance. We AEQ will assume for now that all other elements of the circuit are ideal, too: The value of resistance R is a constant, the internal resistances of the battery (r) and the V = ammeter (RA) are zero, and the internal resistance of the voltmeter (Rv) is infinitely large. Submit Request Answer igure 2 of 2 Part B Part C E int What is the reading I of the ammeter? N 3 Express your answer in terms of & and R. A R I=