The magnetic field intensity in a plane wave that propagates in the negative y direction in space has two components. One has amplitude 2 A/m and is in directed in the positive x direction, the other has an amplitude 4 A/m and is directed in the negative z direction. In addition, the z-directed component, lags behind the x-directed component by 45º. Find the polarization of the wave, including its sense of rotation, if any.

The heater element of a 120 v toaster is a 5.4 m length of nichrome wire, whose diameter is 0.48 mm. the resistivity of nichrome at the operating temperature of the toaster is 1.3 × 10-6 ω·m. the toaster is operated at a voltage of 120 v. (a) what is the power drawn by the toaster? (b) if the cost of electricity is 12 ¢ per kilowatt-hour, and it takes 2 minutes to toast bread, how much does it cost for toasted bread? (c) when the heater element is at room temperature, is the resistivity in the nichrome wire greater than, less than, or equal to it’s resistivity when at operating temperature? explain.