An electric heater contains 40 litres of water initially at a mean temperature of 15° C. The heater supplies an energy of 2.5 kWh to water.Assuming no heat losses, what is the final mean temperature of water?

Q: What is the Carnot efficiency of a typical geothermal plant and its power capacity in MW? The…

A: Given in the question: The average temperature is: TAVG = 210 C Ambient temperature is: TAMB = 880C.…

Q: 5. Knowing that electrical power (watts) can be found by the product of the voltage and the current,…

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Q: Suppose that the incandescent light bulb is used for lighting whose efficiency is 0.034. (a) Also…

A: a..>> Energy supplied = 400000 J. Energy output = 45 Wh=162000 J. So, efficiency of the power…

Q: 3. An automobile tire is inflated to 30 psig pressure at 50 deg. Fahrenheit, after being driven the…

A: Given: P1=20 psigT1=50°FT1=50°F-32×59+273.15T1=283.15 KT2=90°FT2=90°F-32×59+273.15T2=305.372K

Q: An electric clothes dryer draws 15 A at 220 V. If the clothes put into the dryer have a mass of 7.0…

A: Given input current =15 A input voltage =220 V mass of wet clothes =7 Kg mass of dry clothes =4 Kg…

Q: An electric heater carries 12 A at 110 V, is submerged in 22.5 Ibs of water for 30 minutes. What…

A: Both industrial and household uses necessitate the use of heating. Melting metals, molding glass,…

Q: A 30 x 30 x 30 m room is installed with a fan designed to supply air every second. If the losses due…

A: Given,The volume of the room,V=30×30×30 mThe fan supplies air every second.So, t=1sDue to…

Q: BJAn electric heater consumes 1.8MJ when connècted to a 250V supply for 30 minutes. Find the rating…

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Q: A 250 V, 10 A energy meter on half load unity power factor test makes 80 revolutions in 360 seconds.…

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Q: 2. A 100 MW station power plant uses coal of calorific value 6400 kcal/kg. Thermal efficiency of the…

A: Given in the question: Capacity of plant, P = 100 MW Calorific value, CF = 6400 KCal/Kg Thermal…

Q: 6. A fan that consumes 20 W of electric power when operating is claimed to discharge air from a…

A: Claim Is not reasonable. Explanation is given in step-2

Q: Q6/An air conditioner removes heat steadily from a house at a rate of 750 kJ/min while drawing…

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Q: Appliances Load No. of Hours Used Electric Iron 1,200 watts 2 hours Water Heater 1,000 watts…

A: Electrical energy consumed is measured in Killo Watt Hour (KWH). One KWH is said to be one unit of…

Q: A steam power station has a coal consumption of 0.54kg/kwhand a load factor of 50%. If the heating…

A: In this question we need to find energy generated per annum, thermal efficiency and coal consumption…

Q: Two DC houses are connected to 200VDC network. The first house operates only for 10 hours per day…

A: NOTE- As per the rules we can answer only 3 sub-parts, please post the remaining sub-parts as the…

Q: ) A heater with resistance 10 N is driven by an AC voltage source (120 V). For the circuit shown…

A: As per the guidelines, we supposed to answer first three part of the question at a time so please…

Q: An energy meter rated as 5A, 230V makes 480 revolutions per kWh. If in a test at full load, unity…

A: Given Voltage 230 V Current 5 A Number of revolutions per kW = 480 Number of revolutions per sec = 6…

Q: Anoil fired furnace is heating 10 TPH material. The temperature of material is increased by 50°C to…

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Q: H.W. 1.1: it is required to maintain a loading of 5 kW in a heating unit. At an initial temperature…

A: The formula to find the final temperature of heating unit is, V=Vref1+αT-Tref Where, V is voltage,…

Q: An electric heater carries 12 A at 110 V, is submerged in 20lbs of water for 30 minutes. What will…

A: To find the final temperature of water

Q: a) Determine the total of land area needed to supply for 33.2×10' people, if the average energy…

A: Given information, Population is 33.2×107. Average energy used per capita is 4206 kWh. Efficiency of…

Q: During a weather storm, an atmospheric discharge hits a lightning pole that is grounded through a…

A: Given that , ra=41 mrb=41m+0.4 m=41.40 mI=14776 Aρsoil=100 ohm-m Although, for given system…

Q: A 600 MW PWR nuclear plant uses 4% enriched uranium fuel has a thermal efficiency of 36%. The burn…

A: Nuclear reactors produce roughly 20% of the electricity consumed in the United States. Uranium is…

Q: Determine the thermal efficiency of a steam power station given the following data:  Coal…

A: Given  A problem on thermal efficiency of a steam power station. Please find the below attachment…

Q: On a really cold day (prior to COVID), the University of Calgary campus was consuming 10.3 MVA of…

A: The given information is: Apparent Power, S=10.3MVA Power factor of the load, pf=cosϕ=0.94lagging…

Q: A 60 MW steam power station has a thermal efficiency of 30%. If the coal burnt has a calorific value…

A: Given: A steam power station has: Power=60 MW Thermal efficiency ηthermal=30% Calorific value=6950…

Q: A young solar energy enthusiast is planning to install a photo-voltaic system in a location where…

A: Given data: Average solar irradiance = 5kW-hr/m2 Total area = 5*2m2 = 10 m2 Cell efficiency = 18%…

Q: A diesel powerplant has the fuel consumption of 250gm/kWh. The calorific value of fuel is…

A: As per our policy I have to do the first one only. Given data, Fuel consumption = 250 gm/kWh.…

Q: Device using AC Device using DC current Current Refrigerators Mobile Dishwashers laptop Garbage…

A: Various devices used in our day to day lives are being classified as operating with AC current and…

Q: A thermal station has the following data: Max. Demand = 40,000 kW, Load factor = 60%. Thermal…

A: In this question we need to find a consumed coal to produce 1KWh of Electrical energy.

Q: A 200-turn solenoid produces 400,000 Maxwell when excited by current of 2 amps. Calculate the…

A:

Q: An electric motor rated 1,200 W , 0.9 pf lagging is connected to a 220-V supply. Find the apparent…

A: Given:Rated power nor true value, P=1200Wpower factor, cosϕ=0.9 laggingV=220 V

Q: Q2 / 500 Watt electric heater, calculate the amount of electric current and the electrical power…

A: Write the given values. P=500 WVACRMS=220 Vt=2 hrs=7200 s

Q: An all-electric car (not a hybrid) is designed to run from a bank of 12.0 V batteries with total…

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Q: How many calories are developed in 1.0 min in an electric heater which draws 5.0 A when connected to…

A: In this question,  We need to choose the correct option What is energy in calories if Voltage V=…

Q: An Otto cycle operates with volume of 50 cm^3 and 500 cm^3 at TDC and BDC, respectively. If the…

A: Given, Minimum volume=50 cm3 Maximum volume=500 cm3 Power output =100kW k=1.35

Q: Consider the following circuit diagram. 20 Ω 2mF R 50_30° V w = 2000 rad/sec 4 mH %3D Find the…

A: Find maximum average power absorbed by RL To find Tharenin impedence  ZTh = 8j…

Q: An electric radiator is required to dissipate 1 kW when connected to a 230 V supply. If the coils of…

A: The solution is given below

Q: A gas turbine develops 120 kJ of work while the compressor absorbed 60 kJ of work and the heat…

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Q: . Review. The heating element of an electric coffee maker operates at 120 V and carries a current of…

A: Given,  Voltage (V) = 120 V Current (I) = 2 A Mass of water (m) = 500 grams Initial temperature (T1)…

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Q: Four cubic meters of water is to be heated by means of four 1.5 kW, 230-V immersion heating…

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Q: The resistance of a coil aluminum wire at 21OC is 210Ω. The temperature of the wire is increased and…

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Q: A wind turbine has blade diameter of 30 m operating with a wind speed of 20 m/s. If the energy…

A: Given data, A wind turbine has Blade diameter d=30 m Wind speed v=20 m/s Energy conservation…

Q: A single energy meter has a meter constant of 200rev/kwh. When supplying a non-inductive load of 4.4…

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Q: A PV module produces 263W maximum power at 1100 W/m². Calculate the maximum power output at an…

A: The maximum power output at an irradiance level is given by maximum power x irradiance level/…

Q: :An industrial heater has a nameplate that reads Vrms 235 Hz 64 kVA 75 lagging 0.81 ?What is the…

A: Given data,  Vrms = 235 volts  frequency = 64 Hz  Apparent power (S) = 75 kVA  Power factor = 0.81…

Q: Q7: How can you explain scientifically the generation of high voltages to feed the ignition plugs in…

A: Electrical machines can be either generator , transformers or motors. They can be either Ac machines…

Q: A domestic refrigerator rejects 470 W of thermal energy to the air in the room at 15°C. Inside the…

A: Given, A domestic refrigerator rejects thermal energy, Qt=470 W The reject thermal energy inside the…

Synchronous Generator

In comparison to an asynchronous generator, it is a machine where the rotor speed is equal to the rotating magnetic field produced by the stator, i.e., mechanical speed is equal to the electrical speed, thus called synchronous, and not asynchronous.

Salient Pole Rotor

Salient pole rotor includes a large number of exposed poles mounted on a magnetic wheel. The construction of a bright pole is as shown in the image on the left. The proposed poles are made of metal laminations. The rotor winding is provided on these poles and is supported by pole shoes.