Show that the quantity volts squared per ohm (V2/Ω)has SI units of power.
Answer to relevant QuestionsAn electric water heater is designed to produce 50 kW of heat when it is connected to a 240-V source. What is its resistance? A welding machine draws 18 A of current at 240 V. (a) What is its power rating? (b) What is its resistance? (c) When it is inadvertently connected to a 120 V outlet, the current in it is 10 A. Is the machine’s ...You are given four A batteries that are rated at 1.5 V each. The batteries are grouped in pairs. In arrangement A, the two batteries in each pair are in series, and then the pairs are connected in parallel. In arrangement B, ...(a) Find the individual monthly (30-day) electric energy costs (to the nearest dollar) for each of the following household appliances if the utility rate is $0.12/kWh: central air conditioning that runs 30% of the time; a ...The tungsten filament of an incandescent lamp has a resistance of 200 Ω at room temperature. (a) What would the resistance be at an operating temperature of 1600oC? (b) Assuming it is plugged into a 120-V outlet, what is ...
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