Question

Current and Resistance 1. Rank in order from brightest to dimmest the light bulbs in the figure below. exceeds 2A. The only material you have access to that you can build the fuse out of has a max current density of 375A/cm2 (this means it will melt if the current density is larger than this value). What is the diameter of a wire made from this material that will work for your job? 3. You are doing an experiment in a super secret underground base. The system you are working on has a current output with respect to time that follows the equation: I(t) (3A)eft/(3.3us)) a) Graph 1 vs t for t between 0 and 10 μ b) Derive the equation for the total charge that has entered the section of wire you are monitoring at time t. The inital condtions aret-0 and -o metal sphere. It has an inner radius of c, an outer radius of d, and conductivity o. The current I travels radially outward from c to d. Find an equation for the E-field strength inside the metal as a function of r.

Answer 1