Atoroid filled with a magnetic substance carries a steady current of 1.9 a. the coil contains 1200 turns, has an average radius of 3.86 cm. the magnetic field through the toroid is 0.289683 t. assume the flux density is constant. what is the magnetic field strength h within the core in the absence of the magnetic substance? answer in units of a/m. 013 (part 2 of 2)
determine the permeability of the core material. answer in units of wb/a m.

The intensity of a polarized electromagnetic wave is 12 w/m^2. part a) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=0∘ with the plane of polarization? part b) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=30∘ with the plane of polarization? part c) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=45∘ with the plane of polarization? part d) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=60∘ with the plane of polarization? part e) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=90∘ with the plane of polarization?

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?

Astep up transformer has 250 turns on its primary and 500 turns on it secondary. when the primary is connected to a 200 v and the secondary is connected to a floodlight that draws 5a, what is the power output? show all of your work.