HomeworkLib
Question

What is the resistance of a heating element when the current through it is 1.20 A...

What is the resistance of a heating element when the current through it is 1.20 A and it is consuming electrical energy at a rate of 220 W? Express your answer in ohms to three significant figures.

science   physics   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

Since V = R I, We may write P = ( R I )( I ) or   P = R I2.

V= RI

P=VI

P=RI2

220 = R *(1.20*1.20)2

R=152.78 Ω.

0 0
Add a comment
Know the answer?
Add Answer to:
What is the resistance of a heating element when the current through it is 1.20 A...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • PART A: A voltage of 18.0V across the terminals of a device produces a current of...

    PART A: A voltage of 18.0V across the terminals of a device produces a current of 3.00 mA through the device. What is the resistance of the device? Express your answer in kilohms to three significant figures. PART B: An old battery with an emf of 8.4 V has a terminal voltage of 8.0 V when it is supplying a current of 2.0 mA. What is the internal resistance of the battery? Express your answer in ohms as an integer....

  • Problem 1.20 The voltage and current at the terminals of the circuit element in (Figure 1)...

    Problem 1.20 The voltage and current at the terminals of the circuit element in (Figure 1) are zero fort < 0. u= (1500t + 1)e 750t V t> 0; i= 70e 7500 mA, t> 0. Part A where t is in seconds Find the time (in milliseconds) when the power delivered to the circuit element is maximum. Express your answer using three significant figures. t = 0 ms Submit Previous Answers Correct Part B Find the maximum value of p...

  • Q26.4: The heating element of a hair dryer dissipates 1500 W when connected to a 150...

    Q26.4: The heating element of a hair dryer dissipates 1500 W when connected to a 150 V outlet. You may want to review (Pages 841 - 843) . What is its resistance? Express your answer to two significant figures and include the appropriate units.

  • Problem 1.20 The voltage and current at the terminals of the circuit element in the figure...

    Problem 1.20 The voltage and current at the terminals of the circuit element in the figure are zero for t < 0. Fort > Othey are v = 70e - 1600+ - 70e 400+ V. i = 6.0e 1600 - 6.0e 400mA. (Figure 1) Part A Find the power at t = 625 us. Express your answer to two significant figures and include the appropriate units. p= Value Units Submit Request Answer Figure < 1 of 1 > Part B...

  • A heating element in a toaster dissipates 800 W when run at 110 V. How much...

    A heating element in a toaster dissipates 800 W when run at 110 V. How much charge passes through the heating element in 1 minute? Please show all of your work. Express your answer to two significant figures and include the appropriate units.

  • The heating element of tumble dryer is rated at 3.5 kW when connected to a 230...

    The heating element of tumble dryer is rated at 3.5 kW when connected to a 230 V supply Part A What is the current in the heating element? Express your answer in amperes. EVO AE I= A Submit Request Answer Part B Complete previous part(s) Part C What is the resistance of the dryer's heating element at its operating temperature? Express your answer in ohms. VO AEO ? R= Submit Request Answer Part D At £ 0.125 per kWh, how...

  • The heating element of a clothes dryer has a resistance of 18 . A voltage of...

    The heating element of a clothes dryer has a resistance of 18 . A voltage of 220 V is connected across the heating element. What is the current in the heating element?

  • A 110 V heating element in a stove can boil a standard size pot of water...

    A 110 V heating element in a stove can boil a standard size pot of water in 1.2 minutes, consuming a total of 136 kJ of energy. Determine the resistance of the heating element and the current flowing through it.

  • A certain toaster has a heating element made of Nichrome resistance wire. When the toaster is...

    A certain toaster has a heating element made of Nichrome resistance wire. When the toaster is first connected to a 130-V source of potential difference (and the wire is at a temperature of 20.0°C), the initial current is 1.70 A, but the current begins to decrease as the resistive element warms up. When the toaster reaches its final operating temperature, the current has dropped to 1.53 A. (a) Find the power the toaster converts when it is at its operating...

  • An electric current passes through a metal strip 0.40 cm by 5.9 cm by 0.14 mm,...

    An electric current passes through a metal strip 0.40 cm by 5.9 cm by 0.14 mm, heating it at the rate of 52 W. The strip has emissivity e = 1.0 and its surroundings are at 340 K. What will be the temperature of the strip if it's enclosed in (a) a vacuum bottle transparent to all radiation and (b) an insulating box with thermal resistance R = 7.5 K/W that blocks all radiation? Express your answer using two significant...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT