Question

The cylindrical surface of plastic cylinder, 20.0 m long and 2.80 cm in diameter is coated...

The cylindrical surface of plastic cylinder, 20.0 m long and 2.80 cm in diameter is coated on the outside with a uniform layer of gold, 0.09 mm thick. A voltage source of 12 V is applied across the flat ends. ρgold = 2.44 × 10−8 Ω · m.

c. What is the current density?

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
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
Similar Questions
A cylindrical diving bell, 2.80 m in diameter and 6.00 m tall with an open bottom,...
A cylindrical diving bell, 2.80 m in diameter and 6.00 m tall with an open bottom, is submerged to a depth of 220 m in the ocean. The surface temperature is 25.0°C, and the temperature 220 m down is 5.00°C. The density of seawater is 1025 kg/m3. How high does the seawater rise in the bell when it is submerged?
A 17.0 −m -long cable consists of a solid-inner, cylindrical, nickel core 12.0 cm in diameter...
A 17.0 −m -long cable consists of a solid-inner, cylindrical, nickel core 12.0 cm in diameter surrounded by a solid-outer cylindrical shell of copper 12.0 cm in inside diameter and 24.0 cm in outside diameter. The resistivity of nickel is 7.8×10−8 Ω⋅m Part A Calculate the resistance of this cable? Part B If we think of this cable as a single material, what is its equivalent resistivity?   
A long cylinder 11 cm in diameter is initially at a uniform temperature of 427 C...
A long cylinder 11 cm in diameter is initially at a uniform temperature of 427 C and has a density of 7250 kg/m3, thermal conductivity of  16.7 W/m-K, and a specific heat of 540 J/kg-K. The cylinder is suddenly plunged into water with a temperature of 27 C, giving a convective heat transfer coefficient of 380 W/m2-K. a) Determine the surface and centerline temperatures of the cylinder 12 minutes after immersion. b) Calculate the heat transferred from the cylinder during this...
A 1.40 m cylindrical rod of diameter 0.450 cm is connected to a power supply that...
A 1.40 m cylindrical rod of diameter 0.450 cm is connected to a power supply that maintains a constant potential difference of 17.0 V across its ends, while an ammeter measures the current through it. You observe that at room temperature (20.0 ∘C) the ammeter reads 18.6 A , while at 92.0 ∘C it reads 17.3 A . You can ignore any thermal expansion of the rod. a) Find the resistivity and for the material of the rod at 20...
(a) A 34.7-m length of copper wire at 20.0°C has a radius of 0.29 mm. If...
(a) A 34.7-m length of copper wire at 20.0°C has a radius of 0.29 mm. If a potential difference of 7.0 V is applied across the length of the wire, determine the current in the wire. (Use the values in the following table.) Resistivities and Temperature Coefficients of Resistivity for Various Materials (at 20°C) Material Resistivity (Ω · m) Temperature Coefficient of Resistivity [(°C)−1] Silver 1.59 ✕ 10−8 3.8 ✕ 10−3 Copper 1.7 ✕ 10−8 3.9 ✕ 10−3 Gold 2.44...
(a) A 35.1-m length of copper wire at 20.0°C has a radius of 0.31 mm. If...
(a) A 35.1-m length of copper wire at 20.0°C has a radius of 0.31 mm. If a potential difference of 7.0 V is applied across the length of the wire, determine the current in the wire. (Use the values in the following table.) Resistivities and Temperature Coefficients of Resistivity for Various Materials (at 20°C) Material Resistivity (Ω · m) Temperature Coefficient of Resistivity [(°C)−1] Silver 1.59 ✕ 10−8 3.8 ✕ 10−3 Copper 1.7 ✕ 10−8 3.9 ✕ 10−3 Gold 2.44...
A uniform solid marble, of mass m = 20.0 g and diameter 1.00 cm, rolls without...
A uniform solid marble, of mass m = 20.0 g and diameter 1.00 cm, rolls without sliding down a large symmetric steel bowl, starting from rest at point A, at the top of the left(no-slip) side. The top of each side is a distance h = 15.0 cm above the bottom of the bowl. The left half of the bowl is rough enough to cause the marble to roll without slipping, but the right half of the bowl is frictionless...
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...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT