A electron has a negative charge. They represent energy levels.
An example of the use of an electron is the spherical shell. The larger the shell, the more energy the electron has.
Answer:
magnitude of net magnetic field at given point is
![B = 5 \times 10^{-6} T](https://tex.z-dn.net/?f=B%20%3D%205%20%5Ctimes%2010%5E%7B-6%7D%20T)
Explanation:
As we know that magnetic field due to a long current carrying wire is given as
![B = \frac{\mu_o i}{2\pi r}](https://tex.z-dn.net/?f=B%20%3D%20%5Cfrac%7B%5Cmu_o%20i%7D%7B2%5Cpi%20r%7D)
here we we will find the magnetic field due to wire which is along x axis is given as
![i = 30 A](https://tex.z-dn.net/?f=i%20%3D%2030%20A)
r = 2 m
now we have
![B_1 = \frac{4\pi \times 10^{-7} (30)}{2\pi (2m)}](https://tex.z-dn.net/?f=B_1%20%3D%20%5Cfrac%7B4%5Cpi%20%5Ctimes%2010%5E%7B-7%7D%20%2830%29%7D%7B2%5Cpi%20%282m%29%7D)
into the plane
Now similarly magnetic field due to another wire which is perpendicular to xy plane is given as
![i = 40 A](https://tex.z-dn.net/?f=i%20%3D%2040%20A)
r = 2 m
now we have
![B_2 = \frac{4\pi \times 10^{-7} (40)}{2\pi (2m)}](https://tex.z-dn.net/?f=B_2%20%3D%20%5Cfrac%7B4%5Cpi%20%5Ctimes%2010%5E%7B-7%7D%20%2840%29%7D%7B2%5Cpi%20%282m%29%7D)
along + x direction
Since the two magnetic field is perpendicular to each other
So here net magnetic field is given as
![B = \sqrt{B_1^2 + B_2^2}](https://tex.z-dn.net/?f=B%20%3D%20%5Csqrt%7BB_1%5E2%20%2B%20B_2%5E2%7D)
![B = 5 \times 10^{-6} T](https://tex.z-dn.net/?f=B%20%3D%205%20%5Ctimes%2010%5E%7B-6%7D%20T)
Answer:
I would say A.
Explanation:
Homeostasis is pretty much a state of rest or equilibrium. Only A counts, as that wolf is trying to catch its breath and lower its breathing rate and heart rate.
(I could be wrong if B counts. Ya know, if the spider needs to stop being hungry?)