HomeworkLib
Question

A 1.0-mm diameter extension cord is made of metal having a resistivity of 1.68 × 10-8...

A 1.0-mm diameter extension cord is made of metal having a resistivity of 1.68 × 10-8 Ω • m. When it carries a current of 15 A, what is the potential difference between two points in the cord that are 100 m apart?

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

Homework Answers

Answer #1

dia=1mm=1*10^-3m

p=1.68 × 10-8 Ω • m.

I=15 amp

d=100m

A=pie*(10^-30^2/4=7.85*10^-7 m^2

R=PL/A

=1.68 × 10-8 *100/7.85*10^-7

=2.14 ohm

V=IR

=15*2.14

=32V

0 0
Add a comment
Know the answer?
Add Answer to:
A 1.0-mm diameter extension cord is made of metal having a resistivity of 1.68 × 10-8...
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

  • What current (A) is flowing in a resistor if 4.0E16 electrons pass a point in the...

    What current (A) is flowing in a resistor if 4.0E16 electrons pass a point in the resistor in 0.50 s? (e - 1.60E-19 C) QUESTION 17 A 1.0-mm diameter extension cord is made of metal having a resistivity of 1.68E-8 22 m. When it carries a current of 15 A, what is the potential difference (V) between two points in the cord that are 100 m apart? QUESTION 18 An ideal parallel-plate capacitor having circular plates of diameter D that...

  • An extension cord made of two wires of diameter 0.129 cm (no. 16 copper wire) and...

    An extension cord made of two wires of diameter 0.129 cm (no. 16 copper wire) and of length 2.7 m is connected to an electric heater which draws 11.0 A on a 120-V line. The resistivity of copper is 1.68×10−8Ω⋅m. How much power is dissipated in the cord? Express your answer to two significant figures and include the appropriate units.

  • An extension cord made of two wires of diameter 0.129 cm (no. 16 copper wire) and...

    An extension cord made of two wires of diameter 0.129 cm (no. 16 copper wire) and of length 2.3 m is connected to an electric heater which draws 16.5 A on a 120-V line. The resistivity of copper is 1.68×10−8Ω⋅m. Part A How much power is dissipated in the cord? Express your answer to two significant figures and include the appropriate units. P P = nothingnothing SubmitRequest Answer

  • A cylindrical cable with 2.20 x 10-8 m resistivity carries a current of 1400 A. There...

    A cylindrical cable with 2.20 x 10-8 m resistivity carries a current of 1400 A. There is a potential difference of 2.3 x 10-2 V between two points on the cable that are 0.31 m apart. What is the radius of the cable?

  • A current of I=8.0 A is flowing in a typical extension cord of length L=3.00 m....

    A current of I=8.0 A is flowing in a typical extension cord of length L=3.00 m. The cord is made of copper wire with diameter d=1.5 mm. The charge of the electron is e=1.6×10-19 C. The mass of the electron is m=9.1×10−31 kg. The resisitivity of copper is ρ=1.7×10−8 Ω⋅m. The concentration of free electrons in copper is n=8.5×1028 m−3. Find the total number of collisions (Nc) that all free electrons in this extension cord undergo in one second.

  • A wire is made of a material with a resistivity of 6.56847 × 10−8 Ω ·...

    A wire is made of a material with a resistivity of 6.56847 × 10−8 Ω · m. It has length 4.63161 m and diameter 0.76384 mm. What is the resistance of the wire? Answer in units of Ω.

  • 15. A spool of aluminum wire 290 m long and with a diameter of 0.440 mm...

    15. A spool of aluminum wire 290 m long and with a diameter of 0.440 mm is at 20.0°C. For aluminum, the resistivity is 2.82 ✕ 10−8 Ω · m and the temperature coefficient of resistivity is 3.90 ✕ 10−3 (°C)−1. (a) What is the magnitude of the electric field (in V/m) in the wire if it carries a current of 0.600 A? V/m (b) What is the electric power (in W) delivered to the spool while it carries a...

  • Marvin uses a long copper wire with resistivity 1.68 x 10^(-8)Ω⋅m and diameter 1.00 x 10^(−3​​...

    Marvin uses a long copper wire with resistivity 1.68 x 10^(-8)Ω⋅m and diameter 1.00 x 10^(−3​​ )m to create a solenoid that has a 3.00 cm radius Calculate the total resistance if Marvin uses 10.8 meters of wire to create the solenoid.

  • A solenoid is made from wire of resistivity ρ= 1.72 10 ^-8 m Ω⋅ and diameter...

    A solenoid is made from wire of resistivity ρ= 1.72 10 ^-8 m Ω⋅ and diameter 0.8 mm that is wrapped into 200 loops of 4 cm diameter. The solenoid is 8 cm long. If an emf of 12 V is connected to the ends of the wire, what is the magnetic field that this solenoid produces? Determine the length of wire and calculate the resistance in the wire. R= ρ L/A Calculate the current in the solenoid. Calculate the...

  • A cylindrical resistor of radius 5.4 mm and length 2.3 cm is made of material that...

    A cylindrical resistor of radius 5.4 mm and length 2.3 cm is made of material that has a resistivity of 3.50×10-5 Ω m. What is the current density when the energy dissipation rate in the resistor is 1.0 W? What is the potential difference?

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