A 1⁄2 hp motor draws a current of 4.0 A from a 120-V line. (a) Calculate the electric power used by the motor. (b) Calculate the motor’s efficiency – that is, the work it does per unit time divided by the electrical power it uses

Q: A 165-kV power transmission line carrying 500 A is hung from grounded metal towers by ceramic…

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Q: Assuming 95.0% efficiency for the conversion of electrical power by the motor, what current must the…

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Q: Consider that a heart of defibrillator uses 404 j of energy in 11 ms What is the average power…

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Q: How many kW of energy does a 650-W toaster use in the morning if it is in operation for a total of…

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Q: Assuming 95.0% efficiency for the conversion of electrical power by the motor, what current must the…

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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: A certain electric motor draws a current of 43 A when connected to 120 V. (a) What is the motor's…

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Q: What is the useful energy output when a 60 W light bulb is on for 2 hours? Recall, traditional light…

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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 student keeps his 9.0 V, 6.4 W radio turned on at full volume from 7:00 p.m. until 6:00 a.m. How…

A: Given,Potential = 9 VPower = 6.4 WTotal time radio used, t = 11 hrs =11×60×60 = 39600 s

Q: Assuming 95.0% efficiency for the conversion of electrical power by the motor, what current must the…

A: Given Efficiency η=95% Voltage V=12 V Mass m=828 kg (a) The required power is,…

Q: A 5000 Watt motor does 15,000 Joules of work while drawing 5.0 amps of current.  What is the…

A: Find the voltage.  P=VIV=PI=5000 W5 A=1000 V

Q: A stationery shop use the following electric appliances: (i) Four Air Conditioner of rating 1900 W…

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Q: An electric light bulb rated at 100 W is left on for 10 days and nights. (a) How much energy was…

A: Given data:  Power rating of electric light bulb (P) = 100 W = 0.100 kW Time (t) = 10 days and…

Q: A certain electric motor draws a current of 10 A when connected to 120 V. (b) How much energy does…

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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.