a long pair of insulated wires serves to conduct 24.5A of dc current to and from and instrument. if the wires are of negligable diameter but are 2.8mm apart, what is the magnetic field 10.0cm from their midpoint in their plane?

The figure below shows a section of an overhead power line that is 57.5 m long and carries a current of 2.25 kA. The current is directed to the north. The magnitude of the Earth's magnetic field at this location is 5.30 x 10-5 T. The field has a northward component and a downward component, so that it makes an angle of 65.0° with the power line. 65.0⁰ (a) What is the magnitude of the magnetic force (in N) on the power line? N (b) What is the direction of the magnetic force on the power line? O north (in the same direction as I) O south (in the opposite direction as I) O east (out of the page) O west (into the page) O upward O downward O in the same direction as B

An electron moves in a circular path with a speed of 1.49 x 10' m/s in the presence of a uniform magnetic field with a magnitude of 2.12 mT. The electron's path is perpendicular to the field. (a) What is the radius (in cm) of the circular path? cm (b) How long (in s) does it take the electron to complete one revolution?

A lightning bolt may carry a current of 1.00  104 A for a short time. What is the resulting magnetic field 180 m from the bolt? Suppose that the bolt extends far above and below the point of observation. ?T