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Q: A 1050 W radiant heater is constructed to operate at 115 V. (a) What is the current in the heater…
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Q: The heating element of a coffeemaker operates at 120 V and carries a current of 7.70 A. Assuming the…
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Q: A 2.5 kW heater element from a dryer has a length of 59 cm. If a 12 cm section is removed, what…
A: Given values:Power of heater element, P = 2.5 KwInitial length of dryer, Li = 59 cm = 0.59 mFinal…
Q: (a) What is the cost of heating a hot tub containing 1490 kg of water from 10.0°C to 40.0°C,…
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Q: ) In the figure what value must R have if the current in the circuit is to be 0.93 mA? Take ₁ = 2.2…
A: Current = i = 0.93 mA E1 = 2.2 V E2 = 3.4 V
Q: The power usage of a DC strip heater is to be determined at a 95% confidence interval, using a…
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Q: Find the current through a person and identify the likely effect on her if she touches a 120 V AC…
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Q: An electrical heating coil is immersed in 3.52kg of water at 22C. The coil, which has a resistance…
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Q: A TV works properly under the voltage of ΔV = 180 V with power P = 1740 W. (a) Express the current…
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Q: n electric oven of 2kW power rating is operated in a domestic electric circuit that has a current…
A: Power = 2 kW = 2000 Watts Current = 5 A Voltage = 220V Power = current × voltage
Q: Given that E-12.0 V, R₁ – 1.00 £2, R₂-2.00 £2, R3-3.00 £2, and R4 -4.00 52, calculate the following:…
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(a) What is the cost of heating a hot tub containing 1480 kg of water from 10.0°C to 40.0°C, assuming 75.0% efficiency to take heat loss to surroundings into account? The cost of electricity is 9.00¢/(kW · h) and the specific heat for water is 4184 J/(kg · °C).
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(b) What current was used by the 220 V AC electric heater, if this took 3.60 h?
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- a) A freezer that is never turned off draws an average current of 2.4 A when it is plugged into a 115 V outlet. What is the yearly cost of operating the freezer if the average cost of electricity is $0.14/kWh [round your final answer to zero decimal places]? b) If you were to replace the freezer in the question above with one that draws an average current of 3.5 A, it would result in a lower electricity cost. True or False?Consider the circuit shown in the figure below. (Assume R = 4.80 Ω and ΔV = 12.0 V.) (a) Find the equivalent resistance of the circuit in the figure. I FOUND IT TO BE 12.11 OHMS(b) Find each current in the circuit.(c) Find the potential difference across each resistor.(d) Find the power dissipated by each resistor.Your design team is analyzing whether solar panels can provide sufficient energy to run the buoy’s electronics. For this design your team selects a 6V @ 333mA (2W) Solar Cell and a 3.7V 1200mAh battery. Because the solar cell, battery, and electronics operate at different voltages, regulators must be applied to the circuit to ensure the voltages are compatible. Assume the regulators are 90% efficient. (A) how many hours of daylight are needed to charge the battery? (B) If the buoy’s electronics are supplied solely from the battery, how many hours will the electronics operate if they draw 200mA continuously?
- Find the current through a person and identify the likely effect on her if she touches a 120 V AC source in the following circumstances. (Note that currents above 10 mA lead to involuntarily muscle contraction.) a) Find the current (in mA) if she is standing on a rubber mat and offers a total resistance of 305 kΩ. b) Find the current (in mA) if she is standing barefoot on wet grass and has a resistance of only 3500 Ω.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.(a) What is the cost of heating a hot tub containing 1510 kg of water from 10.0°C to 40.0°C, assuming 75.0% efficiency to take heat loss to surroundings into account? The cost of electricity is 9.00¢/(kW • h) and the specific heat for water is 4184 J/(kg · °C). $ (b) What current was used by the 220 V AC electric heater, if this took 4.95 h? Additional Materials O Reading