7. Ten electric heaters, each taking 200 W were used to dry out on site an electric machine which had been exposed to a water spray. They were used for 60 hours on a 240 V supply at a cost of twenty paise/kWh. Calculate the values of following quantities involved : (a) current (b) power in kW (c) energy in kWh (d) cost of energy. [(a) 8.33 A (b) 2 kW (c) 120 kWh (d) Rs. 24]

7. Ten electric heaters, each taking 200 W were used to dry out on site an electric machine which had been exposed to a water spray. They were used for 60 hours on a 240 V supply at a cost of twenty paise/kWh. Calculate the values of following quantities involved : (a) current (b) power in kW (c) energy in kWh (d) cost of energy. [(a) 8.33 A (b) 2 kW (c) 120 kWh (d) Rs. 24]

EBK ELECTRICAL WIRING RESIDENTIAL

19th Edition

ISBN:9781337516549

Author:Simmons

Publisher:Simmons

Chapter27: Service-entrance Equipment

Section: Chapter Questions

Problem 32R

See similar textbooks

Similar questions

The cost to operate a clothes dryer for a year is $80.25. If the rate for electrical energy is 8.8¢/kWh, and the clothesdryer is used for 700 hours in a year, what is the power rating of the clothes dryer?
Design a 25V solar PV panel system that can power a home that requires two 30-Watt lamps and four 15-Watt fans for 6 hours daily if the factors for the solar panel generation and the total energy losses respectively are2.92 and 1.3. Take the rating of the available solar PV cell as 5V, 5W
An electric boiler has two heating elements each of 230V, 3.5kW rating and contains 8L of water at 30 deg C. Assuming 10%loss of heat from the boiler, find how long after switching on the heater circuit, will the water boil a atmospheric pressure if the two elements of the heaters are in parallel
Electrical consumption = 76.4 kWh Based on the above home electrical consumption, if the home will be off-grid and powered by a solar energy, what will be the size of solar panel needed to for it? Show solution and explanation
1. A 300W electric heater at 110-V with a safety fuse in the circuit handling 15A of current. How many heaters can be safely operated in the circuit? 2.A heater uses 20A when used in a 110-V line. If electric power costs 11.50 per kilo watt hour, the cost for running the heater for 10 hour is? Give the given and solution as well. thank you so much
A person turns the shower on The electric hot water system and hot water delivery system are 75% and 65% The tap water temperature is 16.0 °C. The comfortable water temperature range is 40-48c. Current unit price of electricity is $0.274 per kWh. If 50.0 L of warm water was used for the shower, what is the difference in the cost if the shower used warm water at 40.0 °C and at 48.0 °C?
Q: Suppose that a fork lifter has a total energy consumption of 150 W.Hr. The total trips of the vehicle are 375. How the battery duty cycle may be calculated in this case?
An electric motor that is used to pump water is rated 220V, 300W. If it is constantly used every 5AM to 7AM, how much are you going to pay at the end of the month for the electricity bill due to usage of electric motor? The charge from the utility is Php 11/kWh.Assume there are 30 days in a month.
A family consumes 15×103 kg of hot water per month and uses an electrical resistance heater to raise water temperature form 20oC to 55°C on average. Assume the cost of electricity is $ 0.01/kWh and the efficiency of the electric heater is about 93 percent due to the heat losses. (a) Determine the annual electricity bill due to water heating. (b) If the family installed a solar water heater (SWH) that supplies the required hot water for 8 months on average (the other 4 months account for cloudy days), what would be the annual saving?
A house has 5 fans of 70 W each that operate for 16 hours a day and one washing machine of 2000 W that operates for 1 hour per day in the month of june. What is the energy consumption of the house in the month of june ?
A) Assume that electricity is supplied at a price of 100Bz per unit. Calculate the electricity bill in a month of 30 days for a house having the following electrical appliances with their average daily use: 1. One vacuum cleaner of 350W working for 30 minutes a day. 2. One refrigerator of 300W working for 24 hours a day. 3. 5 tube lights each of 30W and work for 4 hours a day.
We were asked to calculate the consumption of each person's residence, so let's assume that everyone has the same appliances and the calculation is for 30 days. Shower of 7500 W, 7 min of daily use, 5 people.500 W TV, 6h of daily use. Air conditioning 1300 W, 8h of daily use in summer. Consider the electric energy tariff of R$ 0,49/KWH.