The instantaneous expression for the magnetic field intensity of a uniform plane wave propagating in the +y direction in air is given by: = 4x10−6 cos [10 πt − k0y + π 4 ] (A/m) a) Determine k0 and the location where Hz vanishes at t = 3 (ms) b) Write the instantaneous expression for E

Explanation:

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a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

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