A wire of 80 cm long is bent into a square loop. The wire carries a current of 2.0 A. Then, the loop is immersed in a uniform external magnetic field of magnitude 0.4 T, directed orthogonal to the loop. Determine the magnitude of the magnetic force on each side of the loop due to the uniform external magnetic field. Then, if the plane of the loop is rotated to be parallel to the direction of the uniform external magnetic field, determine the magnitude of the torque on the loop.​

Apoint charge +q is at the origin. a spherical gaussian surface centered at the origin encloses +q. so does a cubical surface centered at the origin and with edges parallel to the axes. select "true" or "false" for each statement below. the electric flux through the spherical surface is greater than that through the cubical surface. suppose (for this statement only), that q is moved from the origin but is still within both the surfaces. the flux through both surfaces remains unchanged. the area vector and the e-field vector point in the same direction for all points on the spherical surface. the e-field at all points on the spherical surface is equal due to spherical symmetry. the flux through the spherical gaussian surface is independent of its radius.