Answer:
By induction method
Explanation:
Induction method involves charging an electrically neutral body by bringing it in contact with an electrically charged body.
For the electrophus, a charge opposite that on the slab is induced on the side in contact with the slab; driving the opposite charge (this will be the same as that on the slab) to the other end of the elctrophus. Touching the electrophus removes the charge opposite the charge induced on the electrophus by the charged slab either by drawing up charge from the earth or taking the charge to earth (depends on the charge. A negative charge is drawn to earth while a positive charge draws up electrons from the earth)
Answer:
The magnitude of force is 1.86 N and the direction of force is towards the other wire.
Explanation:
Given:
Current flowing through each power line, I = 130 A
Distance between the two power lines, d = 40 cm = 0.4 m
Length of power lines, L = 220 m
The force exerted by the power lines on each other is given by the relation:
![F = \frac{\mu_{0}LII }{2\pi d}](https://tex.z-dn.net/?f=F%20%3D%20%5Cfrac%7B%5Cmu_%7B0%7DLII%20%7D%7B2%5Cpi%20d%7D)
Substitute the suitable values in the above equation.
![F = \frac{4\pi\times10^{-7}\times220\times130\times130 }{2\pi\times0.4}](https://tex.z-dn.net/?f=F%20%3D%20%5Cfrac%7B4%5Cpi%5Ctimes10%5E%7B-7%7D%5Ctimes220%5Ctimes130%5Ctimes130%20%7D%7B2%5Cpi%5Ctimes0.4%7D)
F = 1.86 N
Since the direction of current flowing through the power lines are opposite to each other, so the force is attractive in nature. Hence, the direction of force experienced by the power lines on each other is towards the each other.
There is still enough hydrogen to fuse into more Helium but the core begins fusing into larger atoms, as soon as the Helium in the core runs out the star collapses again, heats up, and starts fusing carbon and oxygen into larger atoms