【简答题】A circular loop with radius Rcarries a current I. The loop is in a uniform field【图片】. If the magnetic flux passing through the loop is maximum, the torque on the loop is .
【单选题】The normal to a certain 1-m2 area makes an angle of 60◦ with a uniform magnetic field. The magnetic flux through this area is the same as the flux through a second area that is perpendicular to the fi...