An electric appliance with a current of I and a resistance of R is used for t hours during the course of a month. The cost of operating the appliance at 120-Volts is D dollars. What would be the new cost (in terms of D) if ... a. ... the usage rate was doubled to 2t? b. ... the usage rate was halved? c. ... an appliance which drew twice the current (at 120 Volts) were used? d. ... an appliance with twice the resistance (at 120 Volts) were used? e. ... an appliance with one-half the resistance (at 120 Volts) were used? f. ... the usage rate was doubled and an appliance with twice the resistance (at 120 Volts) were used? g. ... the usage rate was halved and an appliance with twice the current (at 120 Volts) were used? h. ... the usage rate was quartered and an appliance with twice the current (at 120 Volts) were used?

Q: How much does it cost (in P) to operate a 670-W split-type inverter air conditioner for 8 in 30…

A: We have-Power, P= 670 Watt=0.67 KWatt.Time, t= 8 h per dayTotal days= 30Hence, time 't'=30×8h= 240 h

Q: During an experiment to verify Ohm's law, the voltage supplied and the current through a circuit are…

A:

Q: How long in minutes will it take a 1-kW. 230-volt percolator to raise the temperature of 1.8 kg of…

A: Power of percolator: P = 1000 Watts Mass of water: m = 1.8 kg  Initial temperature of water: Ti =…

Q: Two heaters A and B are in parallel across supply voltage V. Heater A produces 757 kcal in 20 min…

A: Given that For heater A Heat H = 757 kcal Time t = 20 min Resistance RA = 10 ohm For heater B Heat H…

Q: A freezer that is never turned off draws an average current of 2.4 A when it is plugged into a 115 V…

A: Electric Power is a rate of absorption of energy in the electrical circuit. Since this energy is…

Q: A 0.052-farad capacitor is discharging through a 100-ohm resistor. Calculate the current through the…

A: Given: Capacitance C = 0.052 farad Resistant R = 100 ohm Initial current Io = 1.00 A To determine…

Q: The amount of charge flowing through a particular conducting wire is represented by the equation q…

A: charge through a wire is given by :q(t) = at3 + bt2 + c a = 5 A/s2b = 3 A/s At t= 0.9 seconds ,…

Q: A circuit is connected to a potential difference, V = 26.4 volts, at a power P = 2.2 watts. What is…

A: Given, Potential difference, V = 26.4 W Power,  P =2.2 W

Q: An electric device draws 7.10 A at 240 V. If the voltage drops by 10 % , what will be the current,…

A:

Q: A 100 W electric bulb is used for 10 hours a day. How many units of energy are consumed in 30 days?

A: The total power consumed by a bulb,

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

A:

Q: A refrigerator using 1030 W runs two-thirds of the time. How much does the electricity cost to run…

A: A refrigerator using 1030 W runs two-thirds of the time. How much does the electricity cost to run…

Q: Ex. 14 : A potentiometer wire has a length U1 4 m and resistance 42. What resistance must be…

A: TO find- Resistance in series with potentiometer wire. Given- L=4 m E=2V r=2 ohm Hence, we have-…

Q: 4.A hot-water heater is rated at 4500 W and operates at 240 V. (a) Find the resistance in the…

A: (a) Resistance in the heating element

Q: 1.26 The voltage and current at the terminals of an auto- mobile battery during a charge cycle are…

A:

Q: A solar panel of length L and width W produces 28.4 kWh in a day. Under the same conditions (i.e.…

A:

Q: In a simple electric circuit, Ohm's law states that V = IR, where V is the voltage in volts, I is…

A:

Q: A refrigerator using 1030 W runs one-third of the time. How much does the electricity cost to run…

A:

Q: A refrigerator using 1028 W runs one-third of the time. How much does the electricity cost to run…

A:

Q: A battery with an emf of 26 V delivers a constant current of 4.3 mA to a device. How much work does…

A: Given Data:Emf of battery E = 26 VCurrent I = 4.3 mA = 4.3×10-3 ATime t = 5 minutes = 5 ×60 st = 300…

Q: Maximum surface resistance. Consider a square sheet of side L, thickness d, and electrical…

A:

Q: How much does it cost (in ₱) to operate a 670-W split-type inverter air conditioner for 8 in 30…

A:

Q: In electrical theory, Ohm’s law states that I = V/R , where I is the current in amperes, V is the…

A: Given data The initial potential difference is Vo=110 V The initial resistance is Ro=50 Ω The final…

Q: A tv consumes 98 watts per hour, how much battery is required to keep it on for 8hours

A:

Q: A 12 volt car battery is being used to power a circuit with a total resistance of 0.5 Mega-ohm. a)…

A:

Q: A refrigerator using 1005 W runs one-fourth of the time. How much does the electricity cost to run…

A: Power rating=P=1005 WTotal time=T=30 days=720 hrsRunning time=t=T/4=720/4=180 hrsCost per kWh=C=16¢

Q: An electric water heater consumes 300 watts for 3 hrs per day. What is the cost of running it for…

A: The energy used per day is given as  E=Ptwhere P is the per day power consumedt is the usage time…