A 100-W light bulb is accidentally left on for two days in a basement. If electricity costs 12¢/kWh, how much did this oversight cost?

Q: Assuming the cost of energy from the electric company is $0.110/kWh, compute the cost per day of…

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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: How much energy per unit time does a 6.0 V portable radio use if it draws 250 mA of current?

A: Given data :-                                Voltage V = 6 volt…

Q: A 1520-W hair dryer plugs into a 120-V outlet. What is the current through the hair dryer when it…

A: Power of hair dryer (P) = 1520 W Voltage (V) = 120 volts

Q: The cost of electricity in Saskatoon is currently about 16.35 cents/kWh (including carbon tax). At…

A: Given data: Cost of electricity = 16.35 cents/kWh Power (P) = 80.0 W Time (t) = 2 weeks

Q: What voltage is involved in a 1.44-kW short circuit through a 0.100 - Ω resistance?

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Q: An electric clothes dryer is rated at 2,200 W. How much energy does it use in 45 min?

A: Write the formula for power.

Q: The resistance (in Ω) of a light bulb rated 40 W, 100 V that draws an electric current of 1.4 A is…

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Q: If electricity costs 7.06 cents/kWh, how much would it cost you to run a 120W stereo system 4 hrs…

A: In given this question ,Electricity cost a 7.06 Centet kwhSystem consumed power = 120 WRunning time…

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: Which costs more, running a 1,200-W hair dryer for 5 minutes or leaving a 60-W lamp on overnight?

A: Write the expression for energy consumed by each object .

Q: How much does it cost to operate a 25-WW porch light for 24 hh if electric energy costs 8¢/kWhkWh.

A: Expression for energy used E=Pt=25 W24 h=600 Wh10-3kWh1Wh=0.6 kWh

Q: How much does it cost to operate a 80-WW lamp continuously for a week if the power utility rate is…

A: Given: The wattage of bulb = 80 W. Power utility rate = 25 cents/kWh.

Q: Calculate how much will it cost to light a 25 Watts light bulb for 110 minutes. The cost of…

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Q: Assuming the cost of energy from the electric company is $0.075/kWh, compute the cost per day of…

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Q: for an electric rate of 8.9071/kwh, what does it cost to live a 60 -W light bulb on for 8hr

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Q: How much will it cost to run an electric motor for 10 days if the motor draws 15 A of current from…

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Q: The cost of electricity varies widely throughout the UnitedStates; $0.120/kWh is a typical value. At…

A: Given:Cost of electricity = $0.120 per kWh

Q: What kind of electricity does a computer consume?

A: To discuss the kind of electricity that a computer consume.

Q: An electric clothes dryer is rated at 2,300 W. How much energy does it use in 35 min?   kWh

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Q: Suppose the electric company charges 10 cents per kW·h. How much does it cost to use a 125W lamp 4…

A: The electrical energy is given by  E = P x t  where, P is the power and t is the time.

Q: a heater is left on and uses 0.58 A when plugged into a 120 V line.  if electric power costs 12…

A: Assume that the current and voltage are RMS value, and the heater is purely resistive load.The power…

Q: How much current is flowing from a 12-volt battery connected to a 3.5 Ohm resister?

A: According to Ohm's law Potential difference V through a conductor having current I and resistance R…

Q: An air conditioner, 6400 watts, is used only 4 months out of a year. On a typical day it is used…

A: We first convert the wattage to kilowatts and then use hours operated everyday to find the number of…

Q: How much current must be applied across a 60 light bulb filament in order for it to consume 55 W of…

A: Given data:  Resistance (R) = 60 Ω Power (P) = 55 W Required: Current (I)

Q: A refrigerator using 1013 W runs one-fourth of the time. How much does the electricity cost to run…

A: Given,

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: The cost of electricity in Saskatoon is currently about 16.35 cents/kWh (including carbon tax). At…

A: Given Data Cost of electricity is given as 16.35 cemts/kWh Power of the porch light is Pl=80.0 W…

Q: - Instruments that employing to measuring power of electricity is called--- ) Energy meter b)…

A: Option e) Wattmeter is correct

Q: Show that operating a 100-W lamp continuously for 1 week when the power utility rate is 15¢/kWh…

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Q: The average television is said to be on 6 hours per day. Estimate the yearly cost of electricity to…

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Q: What is the magnitude of charge supplied by a 12 V battery in 2mins to lamp of power 60 Watts ?

A: Given: The electric potential is 12 V The time interval is 2 mins. The power of the lamp is 60 W.

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: How much units of energy is consumed in operating ten 50 watt bulbs for 10 hours per day in a month…

A: Given : n = 10  P = 50 Watt t = 10 hours

Q: An 8-A electric lamp is plugged to a 110-V outlet and used for 45 minutes.How much energy does it…

A: Given data The current through the electric lamp is given as I = 8 A. The voltage is given as V =…

Q: A 10-watt energy-saving fluorescent lamp is designed to produce the same illumination as a…

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Q: How many Wh of energy (rounded to an integer) will a 4.7 V, 3,015 mAh battery provide?

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Q: What is the efficiency of an electric motor that produces 1/3 horsepower (about 250 W) of useful…

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Q: How much does it cost to run a 1500-W hair dryer for 43 minutes each day for one month (30 days) at…

A: Given data: Power (P) = 1500 W = 1.5 kW Daily uses = 43 minutes Number of days = 30 Cost of…

Q: Calculate the cost (in cents) of using a 200-watt television for 30 days if turned on 2 hours per…

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Q: In the US, the conventional voltage seen in a receptacle( wall outlet) is 120 V. How many amperes is…

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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…

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Q: An electric clothes dryer is rated at 3,600 W. How much energy does it use in 25 min?

A: Recall P=E/t So E=Pt

Ohm's law

Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.

Path of Least Resistance

In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.