The net magnetic field at the center of the loop has magnitude Bnet = t R What is the number t? I R I R

3 m ol B. Currents I,=7.0 A and Iz run perpendicular to the x-y plane in long straight wires as shown in the figure. If the net magnetic field at the origin is in the direction shown and 0= 37. Find the value of I (in A). 1, 7.5 2. 10.5

A current of 22.0 mA is maintained in a single circular loop of 4.00 m circumference. A magnetic field of 0.650 T is directed parallel to the plane of the loop. (a) Calculate the magnetic moment of the loop. mA m² (b) What is the magnitude of the torque exerted by the magnetic field on the loop? mN. m

Suppose you wish to produce a 2-T magnetic field in a toroid with an iron core for which magnetic susceptibility is x=3 x 10³. The toroid has a mean radius of 18 cm and is wound with 600 turns. Hint с a. What current is required to produce this magnetic field in the iron core? Current of A is needed. b. For comparison, what current is required to produce the same magnetic field in an air-filled toroid of same geometry? Current of While it is not always practical to have region of magnetic field filled with ferromagnetic materials, this dramatic increase in strength of magnetic field produced is useful in some applications you will see in upcoming chapters. Submit Question 4 A is needed for toroid with no iron core. % Search or type URL 5 MacBook Pro < 6 A 6 7 * 8 ( 9

A segment of wire of total length 5.01 m carries a 17-A current and is formed into a semicircle. Determine the magnitude of the magnetic field (in µT) at the center of the circle along which the wire is placed. - НТ

d d I I xp Two wires are separated by distance d = 0.0398 m, and carry equal currents of 2 A in opposite directions. Find the magnetic field strength at the point P shown in the figure. (in T) OA: 2.136x10-6 OB: 2.841x10-6 OC: 3.778x10-6 OD: 5.025x10-6 OE: 6.683x10-6 OF: 8.889x10-6 OG: 1.182x10-5 OH: 1.572x10- Submit Answer Tries 0/12

The plane of a circular loop with radius 14 cm makes an angle 35 degrees with a uniform magnetic field of magnitude 0.1 T. a) What is the flux through the loop? Wb b) If the field reversed in direction, what is the change in flux? Wb