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A solenoid of radius 3.5 cm has 480 turns and a length of 25 cm. (a) Find its inductance. Em (in) Find the rate at which current must change through it to produce an emf of 70 mV. (Enter the magnitude.) Em Need Help? E Show My Work (Opliunalj @ 3. [-13 Points] DETAILS SERCP11 20.4.P.036. A motor has coils with a resistance of 26 .0. and operates from a voltage of 241 V. When the motor is operating at its maximum speed, the back emf is 140 V. (a) Find the current in the coils when the motor is first turned on. A H (In) Find the current in the coils when the motor has reached maximum speed. A H (c) If the current in the motor were 7.0 A at some instant, what is the back emf at that time? V H A 296 turn solenoid has a radius of 5.25 cm and a length of 21.5 cm. (a) Find the inductance of the solenoid. EM ([3) Find the energy stored in it when the current in its windings is 0.498 A. :m Need Help? _' Show My Work (Optional) a 5. [-18 Points] DETAILS SERCP'H 21.1.P.006. The output voltage of an AC generator is given by Air = (180 V)sin(701rt). The generator is connected across a 12.0-9, resistor. (a) By inspection, what is the maximum voltage? V (b) By inspection, what is the frequency? Hz (c) Find the rms voltage across the resistor. V (d) Find the rms current in the resistor. A (e) Find the maximum current in the resistor: A (f) Find the power delivered to the resistor. W (9) Find the current when t : 0.0050 5. A (h) Should the argument of the sine function be in degrees or radians? O The argument of the sine function should be in degrees. 0 The argument of the sine function should be in radians. 6. [-/1 Points] DETAILS SERCP11 21.2.P.009. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER When a 5.0-HF capacitor is connected to a generator whose rms output is 35 V, the current in the circuit is observed to be 0.35 A. What is the frequency of the source? Hz Need Help? Read It Watch It Show My Work (Optional) 7. [-/3 Points] DETAILS SERCP11 20.1.P.003. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The figure below shows three edge views of a square loop with sides of length { = 0.435 m in a magnetic field of magnitude 1.75 T. Calculate the magnetic flux (in Wb) through the loop oriented perpendicular to the magnetic field, 60.0 from the magnetic field, and parallel to the magnetic field. 0.0 HINT (a) perpendicular to the magnetic field Wb (b) 60.0 from the magnetic field Wb (c) parallel to the magnetic field WbMedical devices implanted inside the body are often powered using transcutaneous energy transfer (TET), a type of wireless charging using a pair of closely spaced coils. An emf is generated around a coil inside the body by varying the current through a nearby coil outside the body, producing a changing magnetic flux. Calculate the average induced emf (in V) if each 14.0-turn coil has a radius of 1.40 cm and the current in the external coil varies from its maximum value of 10.5 A to zero in 7.25 x 10"s. (Hint: Recall from Topic 19 that the magnetic field at the center of the current-carrying external coil is B = NO' . Assume this magnetic field is constant over the interior coil's area and oriented perpendicular to the internal coil.) 2R HINT Need Help? Read ItConsider the arrangement shown in the gure below where R = 7.00 D, f = 1.10 m, and B = 2.75 T. \"1 '51 \"PP "IN (a) At what constant speed (in m/s) should the bar be moved to produce a current of 1.60 A in the resistor? :m/s ([7) What power (in w) is delivered to the resistor? :W (c) What magnetic force (in N) is exerted on the moving bar? (Enter the magnitude.) :N (d) What instantaneous power (in w) is delivered by the force Fm on the moving her? i w An AC power source has an rms voltage of 120 V and operates at a frequency of 60.0 Hz. If a purely inductive circuit is made from the power source and a 47.6 H inductor, determine the inductive reactance and the rms current through the inductor. HINT (a) the inductive reactance (in () (b) the rms current through the inductor (in A) A Need Help? Read It + Show My Work (Optional) 2. [-/2 Points] DETAILS SERCP11 21.4.P.019. A series RLC circuit has resistance R = 70.0 0 and inductance _ = 0.620 H. The voltage source operates at a frequency of f = 50.0 Hz and the reactance is Z = R = 70.0 0. HINT (a) Find the circuit's capacitance C (in F). (b) What is the phase angle (in degrees) between the current and the voltage? Need Help? Read It # Show My Work (Optional) ? . [-/1 Points] DETAILS SERCP11 21.6.P.038. The resonant frequency of a certain series RLC circuit is 2.60 kHz, and the value of its capacitance is 7.00 #F. What is the value of the resonant frequency when the capacitance of the circuit is 9.20 /F? KHz Need Help? Read It