How long can a 1500 W heater be on before using more than 12 kWh of energy?
Q: An electric heater is rated 1500 W. How much energy does it use in 10 hours?
A: Given : P = 1500 W = 1.5 kWh T = 10 hours
Q: An electric heater is rated 2.5 kW. how much energy does it use in 12 hours.
A: Given value--- power = 2.5 kW. time = 12 hour. We have to find--- Energy ?
Q: Calculate the power (heat generated per second) in watts, in resistor R2, given that: R1=5 ohm R2=3…
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Q: Compare the energy consumption of two commonly used items in the household. Calculate the energy…
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Q: A person uses a 1.92 kW air conditioner for 10 hours and a 0.22 kW device for 4 hours. How much will…
A: Answer Energy consumption = power * time Given 1.92 kW a/c for 10 hours 0.22 kW device for 4 hours…
Q: 37. Three identical light bulbs are attached to a battery as shown. Compared to when the switch is…
A: Given Three identical bulbs are connected as shown in the figure.we have to find by what factor the…
Q: A hair dryer is rated at 1200 W. One average, it is used for 400 minutes every month. The rate for…
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Q: 7. A 60W light bulb runs for 3 hours, how much electrical energy has it used?
A: Power = P = 60 W time = t = 3 hours = 3 x 3600 = 10800 s energy = E = ?
Q: A 50.7 ohm resistor is put into a circuit with a 16 volt battery. What is the power dissipated (in…
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Q: A block heater of a car is designed to keep the oil in the engine block warm during cold weather. If…
A: Given data: Voltage (V) = 120 V Current (I) = 3.30 A Required: Power (P)
Q: An electric motor on an airplane operates on 23 volts anddraws a current of 8 amperesa. What is the…
A: Given Data : Potential difference (∆V) = 23 Volts Current (I) = 8 Amperes We have to calculate the…
Q: late energy consumption in KwH
A: In the first circuit 3) We see in the circuit 100 ohms and 200-ohm resistance in parallel, So…
Q: What is the power dissipated in a 20-ohm light bulb powered by a 3.0 - Volts battery?
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Q: A lamp consumes 1000 J of electrical energy in 10 s. What is its power? L00
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Q: How much does it cost to run a 1500-W hair dryer for 18 minutes each day for one month (30 days) at…
A: The equation for the electrical energy consumed is given by
Q: What is the energy used to run a 9v circuit with a 90 ohm resistor for 10 seconds?
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Q: if you turn on a 6w lamp how many seconds was it on if you applied 36000 j to it?
A: Power (P) = 6w Energy (E) = 36000J
Q: How much power is dissipated in a 8.85 Ohm resistor when 4.2 Amps of current run through it?
A: The expression for the required power dissipated is,
Q: How much more energy does a 100 W light bulb use if it is left on 2.08 hours, versus a high…
A: Energy consumed by 100W bulb is E=Pt=100 W2.08 h=0.208×103 Wh=0.208 kWh
Q: The cost to operate a clothes dryer for a year is $80.25. If the rate for electrical energy is…
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Q: What is the voltage provided to a fan drawing 3 A DC current and is operating at 350 W?
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Q: Compare the energy consumption of two commonly used items in the household. Calculate the energy…
A: Wtoaster = 0.0967 kWh Wlight = 116 kWhExplanation:Approach to solving the question:Detailed…
Q: The constant potential difference across a 2 ohm resistor is 20 volts. How many watts of power are…
A: The power dissipated by a resistor is given by the formula P=V2R where, V=potential…
Q: The people who live in suburbs use simultaneously: 2Hp aircon for 3 hrs. 900 watts toaster for 9…
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Q: A 100-ohm load dissipates 400W of power. how much is the voltage and Current across the load?
A: Resistance, R = 100 ohm Power, P = 400 W
Q: ne 9-volt battery contains 19.7 thousand joules of energy. A 4-pack of 9-volt batteries cost $10.31…
A: The energy in one battery E =19.7×103 J Total energy of 4 pack 9V battery is 4E The power is 1 Watt…
Q: . An electric water heater requires 1100 W of power. Electricity costs 8 cents per kilowatt hour.…
A: Given Power of an electric heater = P = 1100 W = 1.1 kW Cost of electricity = 8 cents/kWh We have to…
Q: Suppose you leave a 50 W bulb on for a month. Approximately how much will you pay for using that…
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Q: How much power is produced with a 10 Volt battery delivering its current to a 10 Ohm resister?
A: Given : Voltage = 10 V Resistor = 10 Ohm Required : Power, P
Q: It is often claimed that you should leave the heating system in your house on all the time rather…
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Q: How much energy does a toaster use if it is rated at 1200 W and runs current for 2 minutes as it…
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Q: An 8-A electric lamp is plugged to a 110-V outlet and used for 45 minutes. How much energy does it…
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Q: How much Energy does a 100 W lightbulb use in 8 hours? If the time were doubled what would happen to…
A: Power of bulb = 100 W Time = T = 8 hour
Q: Calculate the power dissipated in R5. www R2-3n R3-6 Nn R4-2 n Rs-6n E= 19.8 V Rs=4n wwww
A: R4 and R5 are in series , their equivalent resistance is given by : R45 = R4 + R5= 2+4= 6 ohm Now,…
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