Answer:
The magnetic field at the center of the coil is 
Explanation:
From the question we are told that
The magnetic field of earth is 
The diameter of the wire is 
The radius is 
The number of turn is 
The current it is carrying is 
The earth magnetic field strength at the center of the coil is mathematically represented as
Where 
is the permeability of free space
So
Answer:
So, instead of fossil fuels, the magnetic field thats creatd by electrified coils in the guideway walls, and on the track combine to propel the train. Just think of it as playing with magnets. The opposite attract while if you put norh to north or south to south, they will push away from each ther. This is just the basic principle of electromagnetic propulsion
Explanation:
<h2>Hope it's helpful for you ✌️✌️✌️✌️✌️</h2>
Due to the gravitational pull of earth the asteroid would be pulled towards earth, so the answer is B.
<span>When you apply force to move an
object at a distance, you are applying work. And work is energy in transit. The
answer is letter D. For example, you see a cart at a distance. You observe that
it is not moving. You want to transfer it to your backyard. You apply force to
the cart and observed that the cart is not at the same position as it was
before. You are applying work to the cart by transferring your energy to it.</span>
