electric potential due to a positive charge is a vector that is directed radially away from the charge. Select one:

An infinitely long wire carrying a current of 7.12 A is bent into the shape shown in the figure. The angle the arc subtends is 0 = 63° and the radius of the arc is 0.11m. Find the magnitude and direction of the magnetic field at the point P which is at the center of the arc.

Assume a wire is lying in a magnetic field (B= (15i - 12j + 13k)T) and the wire has a length described by the vector: L= (4i - 4j)m. If the wire carries 3A current, what would be the magnitude of the force on the wire?

The correct relation between the vector magnetic potential A and the magnetic flux v is: Select one: A = f, v. dl O = f, Ã. di O = f, Ã. ds O Ä = f, v. ds

= The rectangular coil shown in the figure below is in a magnetic field with = 0.05(x + y) T. Find the torque about the z axis when the coil is in the position shown and carries a current of 5A. - 0.04 m X Z -0.08 m 1 →y

10 Given a common magnetic core whose length is 100 cm, its cross-sectional area is 25 cm square. The relative permeability of the core material is 5000. Two coils are tightly wound on the core. N1 =1000 turns and N2 = 500 turns. The self-inductance of coil N1 will be: [ 7.85 m H 15.7 m H 3.927 m H 5.17 mH

This is a practice problem from the Engineering Electromagnetics course in my Electrical Engineering program. Could you please walk me through the steps of solving it so that I can solve more complicated ones in the future? Thank you for your assistance.

Consider two infinitely long parallel wires. The wires are separated by a distance of 10 cm. Both wires carry a current of 5 A but in opposite directions. Compute the force per unit length on wire 2 due to the current in wire 1.

The figure below shows a wire that forms a semicircle of radius R=10. 0 cm  and two straight segments each of length 7.0 cm. The wire carries a current i = 42.0 mA.(a) What are the magnitude, and(b) direction of the magnetic field at point C?

A rod with mass m = 0.720 kg and radius r = 6.00 cm rests on two parallel rails, as shown in the figure. The rails are separated by a distance d = 12.0 cm and have length L = 45. cm.The rod carries a current I = 48.0 A in the direction shown in the figure and rolls on the rails without slipping. There is a uniform magnetic field of magnitude B = 0.240 T perpendicular to the rails and the rod. If the rod starts from rest, what is its speed when it leaves the rails?