2. A water wave has a speed of 4 m/s and 10
1 answer:
You might be interested in
Answer:
0 < r < r_exterior B_total =
r > r_exterior B_total = 0
Explanation:
The magnetic field created by the wire can be found using Ampere's law
∫ B. ds = μ₀ I
bold indicates vectors and the current is inside the selected path
outside the inner cable
B₁ (2π r) = μ₀ I
B₁ =
the direction of this field is found by placing the thumb in the direction of the current and the other fingers closed the direction of the magnetic field which is circular in this case.
For the outer shell
for the case r> r_exterior
B₂ = \frac{\mu_o I}{2\pi r}
This current is in the opposite direction to the current in wire 1, so the magnetic field has a rotation in the opposite direction
for the case r <r_exterior
in this case all the current is outside the point of interest, consequently not as there is no internal current, the field produced is zero
B₂ = 0
Now we can find the field created by each part
0 < r < r_exterior
B_total = B₁
B_total =
r > r_exterior
B_total = B₁ -B₂
B_total = 0
The equation you need to use is 
where Q is the charge in C, I is the current in Amps and T is the time in seconds.
So we have T = 60s
I =
A
let's work out Q
C
this is the total charge passing a point in a minute so divide by the charge of one electron (
) to find the number of electrons passing the point in a minute which equals 
So we have T = 60s
I =
let's work out Q
this is the total charge passing a point in a minute so divide by the charge of one electron (