how can you find the mechanical advantage of the six different simple machines? (simples mechinals are pulleys, inclined plane,
1 answer:
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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
Answer:
The induced current is
Explanation:
From the question we are told that
The number of turns is
The cross-sectional area is
The initial magnetic field is
The magnetic field at time = 1.02 s is
The resistance is
The induced emf is mathematically represented as
The negative sign tells us that the induced emf is moving opposite to the change in magnetic flux
Here is the change in magnetic flux which is mathematically represented as
Where dB is the change in magnetic field which is mathematically represented as
substituting values
Thus
So
The induced current i mathematically represented as
substituting values