The shaft power of a motor is 7.8 horsepower. It draws 50A from 120V. The field winding draws 1.2 A. What is the efficiency of the motor?

Q: Which is a unit of power? a. kWh b. W/s c. A×W d. J/s

A:

Q: The followings are fuel-cost curves for two generating units of a power plant while Pp=550 MW: C, =…

A: Given: Incremental fuel cost of the units are,

Q: If a DC generator delivers 225 W to a load, what is the minimum mechanical power (in watts) needed…

A:

Q: - When an electric motor is running at full speed, the voltage between the ends of the motor is 10 V…

A: According to question:

Q: MCQ: Power of machine when work done is 30 J in a time interval 5 seconds will be 120 W 125 W

A: Given data, Work done W = 30 J, Time interval, t=5 sec.

Q: A DC motor rotates a DC generator with 80% efficiency and loaded with 10KW. Since the ratio of the…

A: Given data Efficiency η=80%=0.8 Pout(gen)Pin(gen)=0.8 Output power of generator Pout=10kw

Q: 5. CEVECO charges customers as follows: Monthly charge P300.00 First 250 kWh @ P2/kWh All additional…

A: The solution can be achieved as follows.

Q: When the energy cost for a motor is P 4.62 at 3 cents per kilowatt-hour, the energy consumed is

A:

Q: 21. Frequency is measured in a. amperes b. volts c. watts d. hertz

A: In this question, choose the correct option Unit of the frequency?

Q: 1-19 Determine the cost of leaving a 10-W bulb on for one year if electricity costs $0.09 per…

A: Given :  A 10 w bulb is ON for a year  To find the cost of electricity

Q: Calculate lo and the power absorbed

A:

Q: 4Ω 6Ω 5Ω 8Ω 10 Ω Rea

A:

Q: In power triangle, the side is equal to true power.

A: Power Triangle :

Q: blow-dryer and a vacuum cleaner each operate with a voltage of 120 V. The current rating of the…

A:

Q: A large generator produces 10,000 kW of power. How many horsepower is this equivalent to?

A: The formula for conversion from kW to hp P(hp)=P(kW)0.746 Where P(hp)= Power in horsepower P(kW)=…

Q: In the shown figure the circulation of A= pa, is on 7. 2. 60° 30° 2. Windows bu

A: Circulation of vector A is the line integration of the A along path.  i.e. ∮ A.dl We will calculate…

Q: 250mA 1 A 500 Q your answer in Ohms R

A: In this we have used the current division method , through current division method we can easily…

Q: An electric lift is required to raise a load of 5 tonnes through a height of 30 m. One quarter of…

A:

Q: The voltage supplied to a water heater was reduces to 75%.The power consumed by the heater will be…

A:

Q: 1702 Volts Votts Figure 692

A: The solution is given below

Q: Mechanical energy is supplied to a d.c. generator at the rate of 4200 J/s. The generator delivers…

A: Given: A D.C. generator having, Input power, Pin=4200 Js=4200 W Current delivers, Io=32.2 A Output…

Q: Q1: a - Calculate the total energy absorbed in KWh and the average power per hour for the figure 1?…

A:

Q: Calculate Power on R1

A:

Q: motor with an efficiency of 87% is required to deliver 3kW of power for an hour. The electrical…

A:

Q: The number of revolutions per kw for a  230v, 10A watt- hour meter is 900. On test at half load, the…

A: In this question we will find energy meter error at half load....

Q: Determine the value of Vx (in volts). 200 10V. 2A 40 0.1V use two decimal places if the answer is…

A: Note: As per the company policy, we experts are allowed to answer only one question. Kindly post the…

Q: The unit of the heat rate is million Btu per hour million Btu per MW million Btu per MWhr O hour per…

A: What is unit of the heat rate?

Q: if a dc generator delivers 180w to a load, what is the minimum hp needed to drive the…

A: if a if a dc generator delivers 180w to a load, what is the minimum hp needed to drive the…

Q: H.W1 In a power measurement, the wattmeter readings were 5,000 and 1,000 W. Calculate power and…

A: This is an easy problem on measurement topic . Look below for solution...

Q: If a DC generator delivers 180W to a load, what is the minimum mechanical power (in watts) needed to…

A:

Q: Convert 25 Hp into megawatts

A: In this case, a power of 25 horsepower (Hp) is to be converted into its equivalent power in…

Q: 7.2 A 30 HP AC motor operates at full load, and draws 25 kW. What is the efficiency of that motor?

A: Given here A 30 HP ac motor operates at full load , draws 25kW here we have to find the efficiency…

Q: 10. Which of the following is not the same as watt? (a) Joule/sec (b) Ampere/volt (c) amperes x…

A: The solution is given below

Q: Determine the unit of energy if the power is measure in mega watts and the time in minutes. O a.…

A: Option d is correct. The explanation is provided below.

Q: What is the power in Watts of 25dBm? 316.2W 316.2mW 17.78W 12 07 W

A: Given: Power in dBm PdBm=25 dBm

Q: What is the efficiency of a power plant if the efficiencies of the boiler, turbine and generator are…

A:

Q: B00 ohms. What is the re

A:

Q: Pick which is the correct answer from the given choices 11. The normal current through a load…

A: The simple problem on network analysis. Look below for the explaination:-

Q: Two wattmeter connected to measure power read W1=30kW and W2 =55kw. What is the power facto

A:

Q: A motor that draws 4.5 kilowatts from the power line and delivers 5 horsepower has an efficiency…

A: Given data, Power drawn by motor that is input power Pin=4.5 kW = 4500 W Power delivered that is…

Q: For Problem 1-3 PROVE THE FOLLOWING EQUATION OF POWER IS EQUAL TO : Pound Foot per second Lb. ft /s

A: The equations for electrical power is given as, P=VIP=I2RP=V2R

Q: 10.7V 400 ohms 400 ohms 400 ohms 1.5V 400 ohms 400 ohms

A:

Q: Which one of the following is the main Function of wind vane in a Wind energy conversion system? a.…

A: Wind vanes are used in wind plants so that by measuring wind direction more power can be obtained.

Q: Assume you have one room it has 7 lamps and they are working 12 hours per day. If the unit price is…

A:

Q: IOU V₁ = 4√ Soa M Z Micke 2502 5005 199 Ix + 2KG V₂

A:

Q: An appliance draws 1A of current when plugged to a 220V outlet.  It was further measured that the…

A: In this question we will find power factor of circuit..

Q: 2Ω 8Ω Rea 6Ω 10Ω

A: To solve above problem, one should know how to find equivalent resistance for series and parallel…

Q: Determine the output power of an electric motor that draws 8A from a 220V source and is 85%…

A: Giveninput current I=8Asupply voltage v=220 vefficiency=85%

Gear Motor

A gear motor is a combination of a gearbox and an electric motor. This combination of two systems is used for efficient usage of the motor. It makes a cost-effective solution for high torque, low-speed applications. These motors are used in our household as, garage door openers, alarm clocks. In commercial areas, hospital beds, cranes.