A toroid with a square cross-section has an inner radius of 20 cm and an outer radius of 30 cm and consists of 800 turns. Determine the ratio of the magnetic field strength at the  inner radius to the magnetic field strength at the outer radius Binner/Bouter.

Calculate the potential difference between the wingtips of an aircraft with the wingspan of 64 m travelling at 709 km.h¹ at 45 degrees to the magnetic field lines of the Earth with B = 50 µT. Give your answer in Sl units.

A hula hoop with diameter 1.28 meters is lying horizontally on the grass in LVC's academic quad. Find the magnetic flux of the Earth's magnetic field through the hula hoop. Consider down to be positive, and answer in units of Wb.

1) The total magnetic field to any current carrying conductor can be solved by a integration b laplacian c curl d differentiation 2) A charge is accelerated from rest through a potential difference. Which of the following is true? a The velocity of the charge is directly proportional to the magnitude of the potential difference b The acceleration of the charge is directly proportional to the square root of the magnitude of the potential difference. c The acceleration of the charge is directly proportional to the magnitude of the potential difference d The answer cannot be found on the other choices 3) Electric fields can be sources of magnetic fields. When does this happen?  a. When the electric field is static and the charge in the said electric field is moving with uniform velocity b. When the electric field is static c. The answer cannot be found on the other choices.  d. When the electric field is static and the charge in the said electric field is moving with constant…