Answer: B
Explanation:
1) Apply Ampere's Law to the loop
![\int{B*} \, ds = u_0I](https://tex.z-dn.net/?f=%5Cint%7BB%2A%7D%20%5C%2C%20ds%20%3D%20u_0I)
![B(2\pi r)=u_0NI\\](https://tex.z-dn.net/?f=B%282%5Cpi%20r%29%3Du_0NI%5C%5C)
The loop has a circumference of 2pir.
The current enclosed is multiplied by N because there is N distinct loops.
![B_1= \frac{u_0NI}{2\pi r}](https://tex.z-dn.net/?f=B_1%3D%20%5Cfrac%7Bu_0NI%7D%7B2%5Cpi%20r%7D)
![B_2=\frac{u_0(3N)I}{2\pi(0.5r) }](https://tex.z-dn.net/?f=B_2%3D%5Cfrac%7Bu_0%283N%29I%7D%7B2%5Cpi%280.5r%29%20%7D)
![B_2=6 B_1](https://tex.z-dn.net/?f=B_2%3D6%20B_1)
Answer is B
Answer:
I am pretty sure it is A!
:D
Answer: Less rain for sure.
Explanation: Without clouds forming over the ocean, rain would be incredibly rare, and the planet would become desert. So if we were to lose all oceans, less rain and clouds would form and eventually we could run out of water. I hope this helps:)
Answer:
A valence number of 1 means that an alement will generally react to lose one electron to obtain a full outer shell.
Group two elements are assigned a valence number of 2. A valence number 2 means that a group two elements will generally react to lose two electrons to obtain a full outer shell.
Explanation:
Hope it helps
force between the two charges (+q1 and +q2),if they are at a distance 'a' is
F1=1/4pieEo q1q2/d^2................ (1)
when the metal spheres are in contact the charge flow from one sphere to another till both the sides acquires the same charge. here q1 and q2 are of same sign,hence after contact each sphere will have a charge
![\binom{q1 + q2 }{2}](https://tex.z-dn.net/?f=%20%5Cbinom%7Bq1%20%2B%20q2%20%7D%7B2%7D%20)
now,the force between them,
f2=1/4pieEo
(q1+q2/2)^2/d^2
from eq (1)and eq (2)
f2=f1 (q1+q2)^2/4q1q2