Lenzs Law And Faradays Law Of Induction :: essays research papers

Lenzs legal philosophy and Faradays Law of Induction1. With this definition of the immingle being , we can now return to Faradaysinvestigations. He found that the order of the emf produced depends on therate at which the magnetized move commutes. Faraday found that if the mingle throughN loops of wire budges by an amount , during a m delta t, the average generate emf during this while isThis fundamental result is known as Faradays legal philosophy of induction.The minus sign is placed there to remind us in which direction the bring on emf acts. Experiment shows that an induced emf always gives rise to acurrent whose magnetised field opposes the original change in liquidise. This is knowna Lenzs justice. Let us apply it to the case of relative motion between a magnetand a coil. The changing flux induces an emf, which produces a current in thecoil and this induced current produces its own magnet field. If the distancebetween the coil and the magnet decreases so the mag netized field, and accordinglythe flux, through the coil increases. The magnetic field of the magnet pointsupward. To oppose this upward increase, the field produced by the inducedcurrent must point downward. Thus Lenzs law tells us that the current must moveby the use of the use of the right hand rule. If the flux decreases, so theinduced current produces an upward magnetic field that is "trying" to maintainthe status quo.Let us consider what would happen if Lenzs law were just the reverse.The induced current would produce a flux in the same direction as the originalchange this greater change in flux would produce an even larger current,followed by a still larger change in flux, and so on. The current would continueto grow indefinitely, producing power (=) even after the original stimulus ended.This would violate the preservation of postcode. Such "perpetual - motion" devicesdo not exist.It is important to note, which I believe was forgotten in the classlecture, i s that Faradays investigation, as summarized in Faradays law, saysthat an emf is induced whenever there is a change in flux. Thus an emf can beinduced in two ways (1) by changing the magnetic field B or (2) by changingthe area A of the loop or its orientation theta with respect to the field.A motor turns and produces mechanical competency when a current is made toflow in it. You might expect that the armature would accelerate indefinitely asa result of applied torque.Lenzs Law And Faradays Law Of Induction essays research papers Lenzs Law and Faradays Law of Induction1. With this definition of the flux being , we can now return to Faradaysinvestigations. He found that the magnitude of the emf produced depends on therate at which the magnetic flux changes. Faraday found that if the flux throughN loops of wire changes by an amount , during a time delta t, the averageinduced emf during this time isThis fundamental result is known as Faradays law of induction.The minus sign is plac ed there to remind us in which direction theinduced emf acts. Experiment shows that an induced emf always gives rise to acurrent whose magnetic field opposes the original change in flux. This is knowna Lenzs law. Let us apply it to the case of relative motion between a magnetand a coil. The changing flux induces an emf, which produces a current in thecoil and this induced current produces its own magnet field. If the distancebetween the coil and the magnet decreases so the magnetic field, and and sothe flux, through the coil increases. The magnetic field of the magnet pointsupward. To oppose this upward increase, the field produced by the inducedcurrent must point downward. Thus Lenzs law tells us that the current must moveby the use of the use of the right hand rule. If the flux decreases, so theinduced current produces an upward magnetic field that is "trying" to maintainthe status quo.Let us consider what would happen if Lenzs law were just the reverse.The induced curren t would produce a flux in the same direction as the originalchange this greater change in flux would produce an even larger current,followed by a still larger change in flux, and so on. The current would continueto grow indefinitely, producing power (=) even after the original stimulus ended.This would violate the preservation of energy. Such "perpetual - motion" devicesdo not exist.It is important to note, which I believe was forgotten in the classlecture, is that Faradays investigation, as summarized in Faradays law, saysthat an emf is induced whenever there is a change in flux. Thus an emf can beinduced in two ways (1) by changing the magnetic field B or (2) by changingthe area A of the loop or its orientation theta with respect to the field.A motor turns and produces mechanical energy when a current is made toflow in it. You might expect that the armature would accelerate indefinitely asa result of applied torque.