Explanation:
For this problem we have to take into account the expression
J = I/area = I/(π*r^(2))
By taking I we have
I = π*r^(2)*J
(a)
For Ja = J0r/R the current is not constant in the wire. Hence
and on the surface the current is
(b)
For Jb = J0(1 - r/R)
and on the surface
(c)
Ja maximizes the current density near the wire's surface
Additional point
The total current in the wire is obtained by integrating
and in a simmilar way for Jb
![I_{T}=\pi J_{0} \int\limits^R_0 {r^{2}(1-r/R)} \, dr = \pi J_{0}[\frac{R^{3}}{3}-\frac{R^{2}}{2R}]=\pi J_{0}[\frac{R^{3}}{3}-\frac{R^{2}}{2}]](https://tex.z-dn.net/?f=I_%7BT%7D%3D%5Cpi%20J_%7B0%7D%20%5Cint%5Climits%5ER_0%20%7Br%5E%7B2%7D%281-r%2FR%29%7D%20%5C%2C%20dr%20%3D%20%5Cpi%20%20%20J_%7B0%7D%5B%5Cfrac%7BR%5E%7B3%7D%7D%7B3%7D-%5Cfrac%7BR%5E%7B2%7D%7D%7B2R%7D%5D%3D%5Cpi%20J_%7B0%7D%5B%5Cfrac%7BR%5E%7B3%7D%7D%7B3%7D-%5Cfrac%7BR%5E%7B2%7D%7D%7B2%7D%5D)
And it is only necessary to replace J0 and R.
I hope this is useful for you
regards
Answer is a) the force caused by the wend nag encountering wind and air.
To find the number of neutrons in an atom, what we must do is to follow the following steps:
1) Find the element in the periodic table.
2) Find the atomic number of the element. The atomic number is the number of protons of a single atom of that element.
3) Find the atomic weight of the element.
4) Finally, we look for the number of neutrons. For this, we follow the following relationship:
Atomic weight - number of protons = number of neutrons.
Answer:
To find the number of neutrons in an atom, you would subtract:
B.) atomic number from mass number
Answer:
1 kg at 1 m/s
Explanation:
less weight to propell it forward
