Question

A circuit consists of a wire with resistivity ρ and length L connected to a voltage...

A circuit consists of a wire with resistivity ρ and length L connected to a voltage source. A piece of the wire is cut, reducing its length by 25%. How should the voltage be set so that the power dissipated by the wire is the same?
Select one:
a. Voltage should be reduced by 25%
b. Voltage should be reduced by 50%
c. Voltage should be reduced by 75%
d. Voltage should be reduced by 13%

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
In a series-connected R-L-C circuit, the frequency is 50 Hz, while the impedance of the circuit...
In a series-connected R-L-C circuit, the frequency is 50 Hz, while the impedance of the circuit is 60 Ω and the power factor is 0.72. The source voltage is behind the current. An actuator (coil) or a capacitor must be connected to the circuit to increase the power factor. Find the value of the element that needs to be connected in order for the power factor to be 1. problem solving required
A wire with a radius R = .89 mm and length 45 cm is made of...
A wire with a radius R = .89 mm and length 45 cm is made of two materials, Carbon and Nichrome (resistivity not given I assume it needs to be googled). The Carbon portion is 15 cm long. The temperature of the wire is 75 oC. The wire is connected to a 12 volt battery. a) Find the total Resistance of the battery as well as the current (I) and the current density (J) and the electric field (E) in...
A heater is being designed that uses a coil of nichrome wire (ρ = 100x10-8 Ω·m)...
A heater is being designed that uses a coil of nichrome wire (ρ = 100x10-8 Ω·m) to generate 100 W using a voltage of V=220V. The wire is 2000 m long. What cross sectional area should the wire have? None of the above 1.7e-2 m2 7.23e-4 m2 4.13e-6 m2 2.06e-3 m2 What is the magnification of a converging lens with a focal length of 7.5 cm when an object is held 5 cm from it? 3.00 2.14 1.36 5.00 None...
29. Where the outside feeder disconnecting means consists of more than one switch or circuit breaker,...
29. Where the outside feeder disconnecting means consists of more than one switch or circuit breaker, determining the rating of the disconnecting means shall be permitted to be done by _____. A. Adding all circuit breakers and dividing by 2 B. Adding connected load and dividing by 1732 C. Combining the ratings of all the switches or circuit breakers D. Calculating the load by taking the first 3,000 VA at 100 percent 30. A 480/240 Volt, Step-down transformer with a...
Part 1: Two Round Conductors Gather all items required for the exercise. Note: If using the...
Part 1: Two Round Conductors Gather all items required for the exercise. Note: If using the lab kit box, remove contents and place in a secure area. Put on your safety goggles. Center the black conductive paper on the top of the box, grid-side up. Place the two metal nuts (conductors) at the (5 cm, 10 cm) and (20 cm, 10 cm) positions on the paper. Secure using two dissection pins for each conductor. See Figure 13. Note: Place the...
QUESTION 1 The term "Slip" indicates the difference between the motor's synchronous speed and the no-load...
QUESTION 1 The term "Slip" indicates the difference between the motor's synchronous speed and the no-load speed True False 1 points    QUESTION 2 Wet Bulb (WB) Temperature: is for the temperature reading form an ordinary mercury bulb thermometer or regular temperature sensor. True False 1 points    QUESTION 3 The refrigerant (R-134a) is the new replacement of the refrigerant (R-22) as it is less harmful to the environment. True False 1 points    QUESTION 4 Draft Gauge and Bourdon...
1) 2 point charges are separated by a distance of 8 cm. The left charge is...
1) 2 point charges are separated by a distance of 8 cm. The left charge is 48 mC and the right charge is -16mC. Using a full sheet of paper: draw the 2 charges separated by 8cm, centered in the sheet. (if you are missing a ruler estimate 8cm as ⅓ a paper sheet length). [6] a) Draw field lines to indicate the electric fields for this distribution. [4] b) Draw 3 equipotential surfaces, 1 each, that pass: -Through the...
In February 2012, the Pepsi Next product was launched into the US market. This case study...
In February 2012, the Pepsi Next product was launched into the US market. This case study provides students with an interesting insight into PepsiCo’s new product process and some of the challenging decisions that they faced along the way. Pepsi Next Case Study Introduction Pepsi Next was launched by PepsiCo into the US market in February 2012, and has since been rolled out to various international markets (for instance, it was launched in Australia in September 2012). The new product...
Please answer the following Case analysis questions 1-How is New Balance performing compared to its primary...
Please answer the following Case analysis questions 1-How is New Balance performing compared to its primary rivals? How will the acquisition of Reebok by Adidas impact the structure of the athletic shoe industry? Is this likely to be favorable or unfavorable for New Balance? 2- What issues does New Balance management need to address? 3-What recommendations would you make to New Balance Management? What does New Balance need to do to continue to be successful? Should management continue to invest...
Please read the article and answear about questions. Determining the Value of the Business After you...
Please read the article and answear about questions. Determining the Value of the Business After you have completed a thorough and exacting investigation, you need to analyze all the infor- mation you have gathered. This is the time to consult with your business, financial, and legal advis- ers to arrive at an estimate of the value of the business. Outside advisers are impartial and are more likely to see the bad things about the business than are you. You should...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT