HELP

As a parallel-plate capacitor with circular plates 20 cm in diameter is being charged, the current density of the displacement current in the region between the plates is uniform and has a magnitude of 28 A/m. (a) Calculate the magnitude B of the magnetic field at a distance r = 68 mm from the axis of symmetry of this region. (b) Calculate dE/dt in this region. (a) Number i Units (b) Number i Units The figure shows a closed surface. Along the flat top face, which has a radius of 1.5 cm, a perpendicular field B of magnitude 0.43 T is directed outward. Along the flat bottom face, a magnetic flux of 0.50 mWb is directed outward. What are the (a) magnitude and (b) direction (inward or outward) of the magnetic flux through the curved part of the surface? B (a) Number i Units (b) Assume the average value of the vertical component of Earth's magnetic field is 35 JT (downward) in some region that has an area of 4.41 x 105 km2. What then is the magnitude of the net magnetic flux through the rest of Earth's surface (the entire surface excluding that region). Number i Units