A 1.2 m wire is formed into a single turn, planar loop. The loop carries a current of 8.75 A and it is placed in a uniform 0.7 T field. a. If the wire was made into square loop, calculate the maximum torque (in Nm units) on the loop due to the magnetic field. Submit Answer Incorrect. Tries 1/10 Previous Tries b. Same question as in part a., except now the wire was formed into a circular loop. Submit Answer Incorrect. Tries 1/10 Previous Tries c. For what angle between the normal to the circular loop and the magnetic field is the torque on the circular loop 50% of the torque computed in part a.? (Express your answer in degrees.) Submit Answer Incorrect. Tries 1/10 Previous Tries

An electron moves along the z-axis with v₂ = 4.7 x 107 m/s. As it passes the origin, what are the strength and direction of the magnetic field at the following (x, y, z) positions? Part A (1 cm, 0 cm, 0 cm) Express your answers using two significant figures.Enter your answers numerically separated by commas. Br, By, B₂ = Submit Part B VE ΑΣΦ Request Answer Ba, By, B₂ = Submit (0 cm, 0 cm, 1 cm) Express your answers using two significant figures. Enter your answers numerically separated by commas. IVE| ΑΣΦ ? Request Answer T ? T

The earth's magnetic field, with a magnetic dipole moment of 8.0 x 1022 A m², is generated by currents within the molten iron of the earth's outer core. Suppose we model the core current as a 3000-km-diameter current loop made from a 1000-km-diameter "wire." The loop diameter is measured from the centers of this very fat wire. ▼ Part B What is the current density J in the current loop? Express your answer to two significant figures and include the appropriate units. J = Submit Part C Лоор Jwire μA Value Submit Request Answer To decide whether this is a large or a small current density, find the ratio of the current density J in the current loop to the current density of a 3.0 A current in a 1.0-mm-diameter wire. Express your answer using two significant figures. 17 ΑΣΦ VO Units Request Answer ? ?

a.) A wire 4 m long has a mass of 224 g. The wire is connected to an emf. What is the minimum current in the wire that would allow it to levitate above the ground in a magnetic field of magnitude0.4 T? Round your answer to 2 decimal places b.) Per previous question, what direction must the current flow?