v Part A The earth's magnetic field strength is 5.0 x 10 * T. How fast would you have to drive your car to create a 3.5 V motional emf along your 1.3 I-long radio antenna? Assume that the motion of the antenna is perpendicular to B. Express your answer with the appropriate units. HA ? m 50000 S Submit Previous Answers Request Answer * Incorrect; Try Again; 5 attempts remainingPart A A radio can be tuned into a particular station frequency by adjusting the capacitance in an L-C circuit. Suppose that the minimum capacitance of a variable capacitor in a radio is 4.10 pF What is the inductance _ of a coil connected to this capacitor if the oscillation frequency of the L-C circuit is 1.61 Mix , corresponding to one end of the AM radio broadcast band, when the capacitor is set to its minimum capacitance? Express your answer in henrys to three significant figures. View Available Hint(s) AEh L= H Submit Part B The frequency at the other end of the broadcast band is 0.544 Mix . What is the maximum capacitance Cmax of the capacitor if the oscillation frequency is adjustable over the range of the broadcast band? Express your answer in farads to three significant figures. * View Available Hint(s) ASch OF ? Cmax = F(Figure 1) shows a 4.0-cm-diameter loop with resistance 0.13 !? Part B around a 2.0-cm-diameter solenoid. The solenoid is 10 cm long, has 300 turns, and carries the current shown in the graph (Figure 2). A positive current is ow when seen from the left. Find the current in the loop at t = 1.5 s. Express your answer with the appropriate units. View Available Hint(s) ? I(1.5) = 0.121 mA Submit Previous Answers * Incorrect; Try Again; 5 attempts remaining Figure 1 of 2 () Part C Find the current in the loop at t = 2.5 s. Express your answer with the appropriate units. I sol View Available Hint(s) 4.0 cm 2.0 cm HA I(2.5) = Value Units SubmitPart A What is the potential difference across a 10.0 ml inductor if the current through the inductor drops from 140 mA to 60.0 mA in 16.0 us? Express your answer with the appropriate units. View Available Hint(s) HA AV = Value Units SubmitOne possible concern with MRI (magnetic resonance imaging) is Part A turning the magnetic field on or off too quickly. Bodily fluids are conductors, and a changing magnetic field could cause electric currents to flow through the patient. Suppose a typical patient has What is the smallest time interval in which a 5.6 T magnetic field can be turned on or off if the induced emf around the patient's body must be kept to less than a maximum cross-section area of 6.0x10 2 me. 0.10 V ? Express your answer with the appropriate units. HA At = Value Units Submit Request AnswerPart A The loop in (Figure 1) is being pushed into the 0.10 T magnetic field at 45 m/S. The resistance of the loop is 0.70 12. What is the magnitude of the current in the loop? Express your answer with the appropriate units. View Available Hint(s) HA ? I = Value Units Submit Part B Figure View Available Hint(s) clockwise O counterclockwise Submit Previous Answers V Correct The field points out of the page. As the loop moves, the flux increases because more of the 5.0 cm increase, the induced current flows clockwise