1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nutka1998 [239]
3 years ago
6

A 6.50-m-long iron wire is 1.50 mm in diameter and carries a uniform current density of 4.07 MA/m^2. Find the voltage between th

e two ends of the wire.
Physics
1 answer:
Sauron [17]3 years ago
4 0

Answer:

V = 0.45 Volts

Explanation:

First we need to find the total current passing through the wire. That can be given by:

Total Current = I = (Current Density)(Surface Area of Wire)

I = (Current Density)(2πrL)

where,

r = radius = 1.5/2 mm = 0.75 mm = 0.75 x 10⁻³ m

L = Length of Wire = 6.5 m

Therefore,

I = (4.07 x 10⁻³ A/m²)[2π(0.75 x 10⁻³ m)(6.5 m)]

I = 1.25 x 10⁻⁴ A

Now, we need to find resistance of wire:

R = ρL/A

where,

ρ = resistivity of iron = 9.71 x 10⁻⁸ Ωm

A = Cross-sectional Area = πr² = π(0.75 x 10⁻³ m)² = 1.77 x 10⁻⁶ m²

Therefore,

R = (9.71 x 10⁻⁸ Ωm)(6.5 m)/(1.77 x 10⁻⁶ m²)

R = 0.36 Ω

From Ohm's Law:

Voltage = V = IR

V = (1.25 x 10⁻⁴ A)(0.36 Ω)

<u>V = 0.45 Volts</u>

You might be interested in
Question 12 of 34 Which of the following means that an object is slowing down? /13 ယာ O A. Its velocity is decreasing. B. Its ac
Vera_Pavlovna [14]

Answer:

A. Its velocity is decreasing

Explanation:

6 0
3 years ago
1. Which of the following best describes a nebula?
Gekata [30.6K]

Answer:

D

Explanation:

denser clouds of particles found in the interstellar medium

8 0
2 years ago
HELP I'll MARK BRAINLY
AURORKA [14]

Answer:

it is plate tectonics option D hope it helps

there are 7 major and 20 minor plates

8 0
2 years ago
Read 2 more answers
you push a box across the floor with a force of 30n you it 15 meters in 8 seconds. how much work did you do how much power did y
Naddika [18.5K]
20m/s newtons per second 


7 0
3 years ago
Read 2 more answers
Imagine that Kevin can instantly transport himself between Planet X and Planet Y. Which statement could be said about Kevin in t
Over [174]
What are the choices ? 

Without some directed choices, I'm, free to make up any
reasonable statement that could be said about Kevin in this
situation.  A few of them might be . . .

-- Kevin will have no trouble getting back in time for dinner.

-- Kevin will have no time to enjoy the scenery along the way.

-- Some simple Physics shows us that Kevin is out of his mind.
He can't really do that.

           -- Speed = (distance covered) / (time to cover the distance) .

If time to cover the distance is zero, then speed is huge (infinite).

           -- Kinetic energy = (1/2) (mass) (speed)² .

If speed is huge (infinite), then kinetic energy is huge squared (even more).
There is not enough energy in the galaxy to push Kevin to that kind of speed.

         -- Mass = (Kevin's rest-mass) / √(1 - v²/c²)

-- As soon as Kevin reaches light-speed, his mass becomes infinite.
-- It takes an infinite amount of energy to push him any faster.
-- If he succeeds somehow, his mass becomes imaginary.
-- At that point, he might as well turn around and go home ...
     if he ever reached Planet-Y, nobody could see him anyway.
8 0
2 years ago
Read 2 more answers
Other questions:
  • Substance a is a solid ionic compound substance b solid covalent compound what would happen if you put them both in the same con
    11·1 answer
  • What happens when an experiment with new information or new technology produces results that support an existing theory?
    7·2 answers
  • : match each description below with the type of star that is described. You may assume that all of the stars described have appr
    10·1 answer
  • What is the maximum speed with which a 1200-kg car can round a turn of radius 90.0 m on a flat road if the coefficient of fricti
    8·1 answer
  • Calculate the speed of a bus that travels a distance of 55 miles in 0.75 hours.
    10·2 answers
  • A soccerball is kicked straight out from a hill at 15 m/s and lands 42m away. how tall is the hill
    12·1 answer
  • The magnitude of the Poynting vector of a planar electromagnetic wave has an average value of 0.724 W/m^2. What is the maximum v
    14·2 answers
  • If a ball is thrown from a tall building, how tall is the building if it takes 6s for the ball to land?
    7·1 answer
  • The wind blows a lawn chair that weighs 4 kg into a fence with a force of 8 N. How much reaction force does the fence exert on t
    10·1 answer
  • An object travels back and forth along a straight line. its velocity, in centimeters per second, is given by the function v(t) =
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!