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 ...
A solenoid, 9.0 m in length, has a cross-sectional area of 0.090m2. If it has 900 loops and a current of 1.2 A, calculate the induced emf for a 10 s change in time. Step 1: Read the problem and identify all variables given. From the problem, we are gi...
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 ...
As illustrated in Figure 1, only part of the beam needs to be rotated, so the components that need to be rotated do not use the same formula as the rest of the components. This implies that in the region of the beam depicted in Figure 1 that has undergone rotation, there exists a ...
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...