Log in
Physics
2
answers
0
watching
114
views
23 Nov 2019

A current of 15 A flows through an electric heater operationg on 120 V. What is the heater's resistance? Compute the power consumption of the electric heater in kW? How much energy does it use in 600 min (=10 hours)? ( Express the answers in both units: kWh and Joule)

Watch
2
answers
0
watching
114
views

For unlimited access to Homework Help, a Homework+ subscription is required.

Unlock all answers

Get 1 free homework help answer.
Already have an account? Log in
Share
Bunny Greenfelder
Bunny GreenfelderLv2
17 Feb 2019
Already have an account? Log in
Share

Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

 
 
 
The heating element of an electric dryer is rated at 4.1 kW when connected to a 240-V line. (a) What is the current in the heating element? Is 12-gauge wire large enough to supply this current? (b) What is the resistance of the dryer’s heating element at its operating temperature? (c) At 11 cents per kWh, how much does it cost per hour to operate the dryer?
 
 

A household's electric bill is shown below. Use this electric billto answer the following questions except for D. For D you'll needto actually go around your home and count up the total wattage ofall the light bulbs you are using.

NOTE: Your answers for A, B, & C must be exact to be counted ascorrect.WebAssign will check your answer for the correct number ofsignificant figures.

Service From: NOV 20 to DEC 18 (28 days)
PREVIOUS BILL AMOUNT PAYMENTS
(-) NEW CHARGES (+) ADJUSTMENTS (+ OR -) AMOUNT DUE (=)
$262.61 $262.61 $114.09 $5.71 $119.80

PREVIOUS METER READING PRESENT METER READING TOTAL USAGERESIDENTIAL SERVICE SALES TAX (3%) NEW CHARGES
51517 kWh 52394 kWh 877 kWh $110.77 $3.32 $114.09


A.) State the number of days in the billing cycle for the electricbill shown above.

Answer:________ days

B.) State the number of kWh used in this cycle.

Answer:________ kWh

C.) State how much the household was charged for energy used inthis cycle. Do not include taxes nor other fees.

Answer: $__________

D.) State the total wattage of all the light bulbs in yourhome.

Answer:________ W

E.) What is the cost per kWh? Do not include taxes nor otherfees.

Answer:_________ $/kWh

Answer:_________ ¢/kWh

F.) In joules, how much energy did this household use?

Answer:__________ J

G.) What was this household's average power consumption? Expressyour answer in both W and kW.

Answer:___________W

Answer:___________ kW

H.) The electric company has seen to it that each home is providedwith roughly 120 V at each electrical outlet (there are a few thatare 240 V but we'll ignore those). Using this fact and yourprevious answer (the power in W) determine the average current thatwas running through this house.


Answer:___________ A

1. A modern color T.V. set draws 5.0 A when operated on120V.
a. How much power does the set use?
b. If the set is operated for an averageof14 h/day, What energy in KWh does it consume per month (30days)?
2. A 100 W lamp is connected to 120 V.
a. How much current flows throughthelamp?
b. What is the resistance of the lamp?

Weekly leaderboard

Home
Homework Help 3,900,000
Physics 110,000
Start filling in the gaps now
Log in