A long, straight current carrying wire has a current of 8.9 amps. A circular counterclockwise current loop of 14.5 amps is positioned above the straight wire such that its center is a distance of 0.646 m above the straight wire. What should the radius of circular loop be if the net magnetic field at its center is 384 x 10° T?

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

= A very long wire carries an i₁ 4 A current along the x axis and another long wire carries an i2 = 9.5 A current along the y axis. What is the magnetic field at point P located at a = 7.9 m and b = 3.8 m? Use out of the page as the positive direction. y i₂ a The magnetic field at P, B = i₁ P b Units HT X

A very long, straight wire carries a current of 0.29 A. This wire is tangent to a single-turn, circular wire loop that also carries a current. The directions of the currents are such that the net magnetic field at the center of the loop is zero. Both wires are insulated and have diameters that can be neglected. How much current is there in the loop?