8. [-/4 Points] DETAILS HRW10 31.P.070. MY NOTES A 44.0 mH inductor has a reactance of 1.20 ki. (a) What is its operating frequency? Hz (b) What is the capacitance of a capacitor with the same reactance at that frequency? F (c) If the frequency is doubled, what is the new reactance of the inductor? (d) What is the new reactance of the capacitor? 9. [-/2 Points] DETAILS HRW10 31.P.030. MY NOTES A 80.0 Q resistor is connected as in the figure below to an ac generator with Em = 25.0 V. iR V (a) What is the amplitude of the resulting alternating current if the frequency of the emf is 1.45 kHz? A (b) What is the amplitude if the frequency is 8.60 kHz? A 10. [-/1 Points] DETAILS HRW10 30.P.064. MY NOTES At t = 0, a battery is connected to a series arrangement of a resistor and an inductor. At what multiple of the inductive time constant will the energy stored in the inductor's magnetic field be 0.580 its steady-state value? Submit Answer4. [-13 Points] DETAILS OSUNIPHYS1 31.P.085. MY NOTES A square loop of side 7 cm is placed with the nearest side 6 cm from a long wire carrying a current that varies with time at a constant rate of 6 Als. (Assume the loop and the wire lie in the same plane. Further assume I = 0 at t = 0. Enter the magnitudes.) (a) Use Ampre's law and nd the magnetic eld from the current in the wire as a function of time and distance rfrom the wire. (Use the following as necessary: u", r, and 1'. Assume B is in teslasr r is in meters and t is in seconds. Do not include units in your answer.) B(r, t) = (b) Determine the magnetic flux through the loop. (Use the following as necessary: yo and t. Assume (I) is in T - n12 and t is in seconds. Do not include units in your answer.) om = (c) If the loop has a resistance of 3 0, how much induced current ows in the loop (in nA)? Em