Astrip of copper 150 µm thick and 4.50 mm wide is placed in a uniform magnetic field of magnitude b = 0.74 t, that is perpendicular to the strip. a current i = 18 a is then sent through the strip such that a hall potential difference v appears across the width. calculate v. (the number of charge carriers per unit volume for copper is 8.47 × 1028 electrons/m3.)

Along, straight wire with 3.0 a current flowing through it produces magnetic field strength 1.0 t at its surface. if the wire has a radius r, where within the wire is the field strength equal to 36.0% of the field strength at the surface of the wire? assume that the current density is uniform throughout the wire

Which units can be used to measure length or distance? check all that apply. gram meter kilometer liter inch

Imagine you work as a consultant, and your daily job involves listening to the constructive criticism of others. as part of your job, you must listen to opposing viewpoints to make important decisions. in this activity, you are a consulting dam engineer. you must make a decision about four different dams; should they be repaired, taken down, or left alone? you will listen to contrasting opinions about what should be done with the dams before you make the final decision. as the consulting dam engineer, what do you decide to do with this dam? explain your reasoning. by making your decision, did you support the opinions of the mayor and/or the dam safety official? why or why not? (site 1)