In Thompson's cathode ray tube experiments, the electrically charged plates are created by a constant applied voltage, which maintains a constant positive charge on one plate and a constant negative charge on the other. Normal household voltage alternates 60 time per second (also called 60 cycles/sec or 60 Hz) between 110 volts and -110 volts. In the apparatus depicted attached graphics, what would we expect to see on the CRT, as configured if the charged plates are plugged into a wall socket, which would switch the charge on the plates from positive to negative 60 times per second

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.