A 30.0-mH inductor has a reactance of 2.10 k. (a) What is the frequency of the ac current that passes through the inductor? (b) What is the capacitance of a capacitor that has the same reactance at this frequency? The frequency is tripled, so that the reactances of the inductor and capacitor are no longer equal. What are the new reactances of (c) the inductor and (d) the capacitor?
Physics 2 for Engineering Week 11 Electromagnetic Induction Maxwell’s Law of Electromagnetism Gauss’s Laws Ampere’s Law Faraday’s Law- induced emf enclosed is equal to the opposite of the rate of magnetic flux Lenz’s Law- direction of induced current opposes the change in magnetic flux B lines diverge as they leave the coil If coils are brought closer, there are more B lines in the remaining area B is induced to cancel the change Motional emf- induced emf generated due to motion of conductor in magnetic field Force exerted by magnetic field B on segment ab, F B ILB I = B L v / R F B B L v / R Induced currents will oppose flux change, generate more additional lines of B Displacement Current Generalizing Ampere’s Law