Question

21. A princess refuses to remove her metal tiara as she has a MRI done, and is moved into a 3.50T field with her head point directly into the field. a. Find the average emf induced in the 20cm diameter tiara, the current induced, the power dissipated, and the magnetic field induced if it takes 3s for her to move into the field and the tiara has 0.02092 of resistance. b. How would the direction of the induced field compare going in and going out? 22. A 50cm long 5cm wide 2000 loop solenoid is hooked to an alternating current source drawing 5A. a. Calculate the self-inductance and the energy stored in the inductor. b. How fast can it be turned off if the induced emf cannot exceed 3.00 V? 23. A 10mH inductor that has 502 of resistance is hooked to 12V battery source for 5ms. What is the characteristic time constant, and the current at that time? 24. An RLC series circuit has a 10.0092, a 10.00mH inductor, and a 10.00uF capacitor, and has a 10V source. a. Find the circuit's impedance and current at 100 Hz. b. Find the resonant frequency of the circuit and the average power dissipated at resonance.

Answer 1

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(bottom view) tiara tiara > B السلاح 20 cm outside insicle MRI .: Tadous Tatoom B=0 is the B = Area Az 582 magnetve feed 3.507 is the magnetic field = 3.14 x 10² = 3lucm2 a. indued emf e= do d (BACOSO) A cos o do db all- db 4 314x10 x 1x 3.50 dB -> change in magnetic field 3 oll time taken 0-0 366 voll induced amf ceerrent induced resistance 0.0 366 volt 0.020 ohm 1. 83 A watt. Ei = 0.0366 X 1.83 = 0.067 power dissipated pa Binequal and opposite to the cennewed foeld] d. (magnetve field inccceed TA to ont- opnose the change will be going b. induced magnetve freed magnete flux