8) A circular loop of diameter 41 cm, carrying a current of 7.93 uA, is placed inside a magnetic field B= - 9.210 cT k. The normal to the loop is parallel to a unit vector n = -0.60 i - 0.80 ĵ. Calculate the magnitude of the torque on the loop due to the magnetic field.

9. A electron with charge -1.60 × 10-19 C and mass 9.11 × 10-31 kg is accelerated from rest through 14.20 kV. It then enters a uniform magnetic field of 7.50 x 10-4 T that is oriented perpendicular to its direction of motion. (a) What is the radius of the path the electron follows in the magnetic field? (b) How long does it take the electron to make one complete circle in the magnetic field?

7. physics physics

A rectangular coil of wire consisting of 10 turns, each 0.20 m long and 0.30 m wide, lies in the xy plane. If the coil carries a current of 2.0 A, what is the torque exerted by a magnetic field of magnitude 0.010 T that is directed at an angle of 30.0 degrees with respect to the positive z axis?   a) 1.2 x 10^-2 N.m b) 2.4 x 10^-2 N.m c) 6.0 x 10^-3 N.m d) 4.0 x 10^-3 N.m e) 3.0 x 10^-3 N.m

A current of strength I=1A flows through the copper wire. The wire consists of two straight parts between points A(1,2,3)cm and B(1,3,2)cm and between points B and C(2,1,3)cm. The wire is located in a homogeneous magnetic field of induction B=1T. a) If the total force on the wire is 0, calculate the direction of the magnetic field. b) If we rotate the direction of the magnetic field so that the total force on the wire is the largest, calculate the maximum possible force on the wire.

10. Two wires carrying 3 A out of the page each are centered about the origin and separated by 8 cm along the x axis. a) Find the magnitude and direction of the magnetic field at a point +4 cm on the y axis. b) Find the magnitude and direction of the field at the origin. c) What is the magnitude of the force between the two wires? Attractive or Repulsive?