In a plane EM wave in vacuum, Group of answer choices the E-field and B-field always reach their respective peak values simultaneously. the B-field always reaches its peak value ahead of E-field. the E-field and B-field reach their respective peak values in random order, but never simultaneously. the E-field usually carries more energy per unit volume than the B-field. the E-field always reaches its peak value ahead of B-field.

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.