How A flat-screen television uses 3 amps and has a power rating of 300 watts. How many volts does it need?

To find the voltage required for the flat-screen television, you can use the formula: Power (watts) = Voltage (volts) x Current (amps). Rearranging the formula gives you Voltage = Power / Current. Therefore, with a power rating of 300 watts and a current of 3 amps, the voltage needed is 300 watts / 3 amps = 100 volts.