Find the emf induced in the coil if the current in the solenoid varies according to I=4.6sin(50∏t)A. Answer: ___cos(50∏t) mV Comments: I can't seem to find the correct answer for the magnetic field of the solenoid. The formula I use is: B=0.5μ0nI(sinθ2-sinθ1) The ...
being pulled across a magnetic field.Electrons in the bar are moving down which can be thoughtof as being a current upwards. Using the right hand rule, acurrent upwards and a field into the page results ina forceon the electrons to the left. End A of the bar becomesnegatively charged ...
Then, under the action of a magnetomotive force excited by the passing of an alternating current through a solenoid coil, the contacts close again; which results in the charging of the capacitor, etc. In the course of discharge via field desorption or vacuum breakdown, directional mass transfer...
In the first place, a formula is proved for indicating a magnetic induction strength inside a long straight helix tube carrying current, with the tubes cross section in tetragonal N regular polygon. 首先证明了正N边形截面长直螺线管内部磁感应强度的公式,进而证明了长直螺线管内部磁感应强度与横截面的...