7. [/2 Points] SERPSEWA10 26.WA.011. Under certain conditions in certain devices, the behavior of the current in a conductor can be represented as a function of time by the equation [(1') = 106"\". Here In is the current at t = O and 1' is known as the time constant. In this case, r = 7.00 ms and the initial current 10 = 3.80 mA. (a) Determine the amount of charge passing through a fixed point in the conductor in the time interval t1 = 0 to 2 = 4:. uC (b) Determine the amount of charge passing through the xed point in the conductor in the time interval t1 = 1 to (2 = 41. HQ 8. [0/2 Points] PREVIOUS ANSWERS SERPSEWA1 0 26.WA.01 9.TUTOR|AL. As part of a class project you are given 0.900 g of copper and asked to fabricate a wire with uniform cross-section. You use up 95% of the copper and make a wire with a resistance of 0.793 Q. The resistivity of copper is 1.72 x 10'8 Q - m and its density is 8.92 x 103 kg/m3. (a) What length of wire do you end up with? 7.86 x How is the volume of metal used related to the length and cross-sectional area of the wire? How is the resistance related to the length and cross-sectional area of the wire? m (b) What is the diameter of the Wire? 0202 x How can you determine the diameter from the area of the wire? mm F9, Tutorial 9. [0/4 Points] PREVIOUS ANSWERS SERPSEWA10 27.WA.017. Consider the circuit shown in the diagram below. The battery has a voltage V = 12.0 V and the resistors have the following values. R1 = 5.49 0; R2 = 10.98 9; R3 = 27.45 Q; R4 = 16.47 0. How much current ows through each of the four resistors? 0.936 What is the totalxcurrent delivered by the battery? What is the voltage across R1? What are the voltages across each of the three parallel resistors? A 1.64 X What is the total current delivered by the battery? What is the voltage across R1? What are the voltages across each of the three parallel resistors? A 1.64 x What is the total current delivered by the battery? What is the voltage across R1? What are the voltages across each of the three parallel resistors? A 0.936 x What is the total current delivered by the battery? What is the voltage across R1? What are the voltages across each of the three parallel resistors? A V