This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A cook plugs a 500 W crockpot and a 1 000 W kettle into a 240 V power supply, all operating on ... (Read 145 times)

pragya sharda

  • Hero Member
  • *****
  • Posts: 566
on: Jul 28, 2018
A cook plugs a 500 W crockpot and a 1 000 W kettle into a 240 V power supply, all operating on direct current. When we compare the two, we find that
 a. Icrockpot < Ikettle and Rcrockpot < Rkettle. b. Icrockpot < Ikettle and Rcrockpot > Rkettle. c. Icrockpot = Ikettle and Rcrockpot = Rkettle. d. Icrockpot > Ikettle and Rcrockpot < Rkettle. e. Icrockpot > Ikettle and Rcrockpot > Rkettle.

Question 2

A small bulb is rated at 7.50 W when operated at 125 V. The tungsten filament has a temperature coefficient of resistivity a = 4.50  10-3 / C. When the filament is hot and glowing, its temperature is seven times room temperature (20 C). What is the resistance of the filament (in ohms) at room temperature?
 a. 234
  b. 1 350
  c. 2 080
  d. 4 530
  e. 5 630


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

juicepod

  • Sr. Member
  • ****
  • Posts: 310
Reply #1 on: Jul 28, 2018
Answer to Question 1

B

Answer to Question 2

A


pragya sharda

  • Hero Member
  • *****
  • Posts: 566
Reply #2 on: Jul 28, 2018
Thank you!


juicepod

  • Sr. Member
  • ****
  • Posts: 310
Reply #3 on: Jul 28, 2018
Always glad to help...


« previous next »
 

Did you know?

Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.

Did you know?

Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.

Did you know?

There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.

Did you know?

All adverse reactions are commonly charted in red ink in the patient's record and usually are noted on the front of the chart. Failure to follow correct documentation procedures may result in malpractice lawsuits.

Did you know?

Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

Remove all of the spark plugs. Be sure to mark the spark plug wires so that they can be reinstalled ... Remove all of the spark plugs. Be sure to mark the spark plug wires so that they can be reinstalled ...
The tension of the spring in the fuel-pressure regulator determines the operating pressure on a ... The tension of the spring in the fuel-pressure regulator determines the operating pressure on a ...
Connect a fused jumper wire to supply 12 volts to terminal 86 and a ground to terminal 85 of the ... Connect a fused jumper wire to supply 12 volts to terminal 86 and a ground to terminal 85 of the ...
Removing the EGR passage plugs from the intake manifold on a Honda. Removing the EGR passage plugs from the intake manifold on a Honda.
Hydroelectric power: 2013 Global Market Hydroelectric power: 2013 Global Market
Power-tower in Southern California, largest such facility in the world Power-tower in Southern California, largest such facility in the world
Video: Deglutition

For a complete list of videos, visit our video library