Compute the cost per day of operating a lamp that draws a current of 1.80 A from a 110 V line. Assume the cost of energy from the power company is $0.0640 / kWh. NOTE: Enter your response with tenths precision.

Two light bulbs are in series, one operating at 120.0 W and the other operating at 60.0 W. If the voltage across the series combination is 120.0 V, determine the current in the circuit.

During  38 seconds  of use,  260 C  of charge flow through a microwave oven. Compute the size of the electric current.

4.1

An electric hot plate has a power output of 2.9 kW when connected to a 97.96 V source. What is the current (in Amperes) being drawn by the hot plate?

If 25 A current flows through a circuit at a voltage difference of 1.3 x 102 V, how much is the power consumption? How many 50-Watt bulbs can be operated with this voltage source? If the charge for consumption rate from Edison is 25 c/ kilowatt-hour, what is the charge for 8 hours? How much is going to be the monthly bill only for these bulbs?

During 42 seconds of use, 230 C of charge flow through a microwave oven. Compute the size of the electric current.

An electric washing machine draws 2.1 A when connected to a 121 V power line. In Arkansas, the average price of electricity is $0.090 per kilowatt-hour. To the nearest cent, how much does it cost to use the washing machine to wash one load of colors and one load of whites if the washing machine runs for 35 min each time it is used? Remember, round to two decimal places, the nearest cent.

The current in a 3.0 V battery of a pocket calculator is 0.17 mA. In one hour of operation, (a) how much charge flows in the circuit and (b) how much energy does the battery deliver to the calculator circuit?

3.50 A 4. In the circuit shown on the right, the rate at which R1 dissipating electrical energy is 20.0W. (a) Find R, and R2. (b) What is the emf of the battery? (c) Find the current through both R2 and the 10.0- resistor. (d) Calculate the total electrical power consumption in all the resistors and the electrical power delivered by the battery. 10.0 R ER 2.00 A