Compute the net flux coming out from charge density D = 2x²y a; t 2yz ay - y2z az %3D CIm2 C Im ? from the bounde d region by

A negatively charged (-121 uC) block is sitting on a frictionless, flat surface. This 12 kg block is attached to a vertical wall with a horizontal, 0.39 m long string that is under a tension of 100 N. Embedded in the wall (on the other side of the string) is another charge. What is the charge of this embedded charge in the wall? Assume that the block is stuck in place.

Consider a conductor plate carrying a current I as shown in the figure. Current flows in the negative direction. It is also known that a conductor has a charge-carrying density of n with 1 particle carrying a charge q . This conductor plate is then placed on the a region with an external magnetic B field in the z direction . Determine the potential difference across the conductors! State the answer in terms of B, n, q, I, B, and d! (Assume positive charge carrier) *This potential, which is often referred to as the Hall potential V_H, is commonly measured in experiments to determine the properties of a material. However, there are other quantities that are also measured namely the Hall coefficient R_H. In ordinary metals, the relationship between R_H and V_H is as following (equation in figure)

A 0.5 mm air gap has cross sectional area of 7 cm². In order to generate a total flux of 50 microweb in the air gap, the mmf required is?