At roughly $0.10/kWh, what does it cost to leave a 25-W porch light on day and night for a year? Hint: 1kWh = 3.6 × 10°Joules $29.80 $54.30 O $6833.33 $16.90
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- A 1·21-MF Capacitor is connected to a North American electrical outlet. (AVrms = 120V₁ f = 60.0Hz). Assuming the energy stored in the Capacitor is Zero at + = 0, determine the magnitude & the current in the wires at t = 192 Note: Answer must be in A. S.A physics student has a single-occupancy dorm room. The student has a small refrigeratorthat runs with a current of 3.00 A at a voltage of 110 V, a lamp that contains a 100-W bulb,an overhead light with a 60-W bulb, and various other small devices adding up to 3.00 W. a. Assuming the power plant that supplies 110 V electricity to the dorm is 10 km awayand the two aluminum transmission cables use 0-gauge wire with a diameter of8.252 mm, estimate the percentage of the total power supplied by the powercompany that is lost in the transmission if the power is transmitted at 110 V. Hint:treat the transmission cables as cylinders and calculate the cable’s resistance fromits length, diameter, and resistivity. b. What would be the result if the power company transmitted the electric power at110 kV?