A long straight wire carries a current of 40 A in a region where a uniform external magnetic field has a 30 µT magnitude and is parallel to the current. What is the magnitude of the resultant magnetic field at a point that is 3.5 cm from the wire?

A straight wire carries 3.00 A current pointing to the x-axis. What is the magnitude and the direction of the magnetic field 2.00 m below the wire?

A current path shaped as shown in the figure produces a magnetic field at P, the center of the arc. If the arc subtends an angle of e = 60.0o and the radius of the arc is 0.600 m, what are the magnitude and direction of the field produced at P if the current is 4.00 A? Use ds=rde, wherer is the radius of the arc and e is in radians, not degrees. magnitude nT direction ---Select---

S long, straight wire allows 3.5 A through it. What is the magnitude of the magnetic field 25 cm from the wire?

A horizontal current-carrying wire that is perpendicular to the plane of the paper is placed in a uniform magnetic field of magnitude 2.2 mT that is parallel to the plane of the paper and points down. At the distance 1.0 cm to the right of the wire, the total magnetic field is zero.

A conductor consists of a circular loop of radius R=15 cm and two straight, long sections.The wire lies in the plane of the paper and carries a current of i=1.00 A. Determine the magnitude and direction of the magnetic field at the centre of the loop.

A metal rod of 2.50m long stands vertically near the earth’s equator carrying a current of10.0A away from the ground. The earth’s magnetic field at the location has a magnitude of 0.500 10 to negative 4th power Tand points directly to the north. (a) what is the smallest angle between the current inthe rod and the magnetic field of Earth at that location? (b) What is the magnitude of the magneticforce on the rod? (c) What is the direction of the magnetic force on the rod?

A wire carrying a current is  shaped in the fom of a circular loop of radius 4.0 mm.  If the magnetic field strength at its center is 1.1 mT with no external magnetic field contributing to it, what is the magnitude of the current that flows through the wire?

Three long, parallel conductors each carry a current of I = 2.00 A. Figure is an end view of the conductors, with each current coming out of the page. Taking a = 1.00 cm, determine the magnitude and direction of the magnetic field at point A. (Hint: The magnetic field of a long, straight, current-carrying conductor at all points on a circle of radius r around the conductor is B = where Ho = 4n x 10-7 T.m/A). 2ar I