Question 16. How is it possible to induce a current in a wire that moves through a magnetic field...

Question

Question 16. How is it possible to induce a current in a wire that moves through a magnetic field without the use of a battery or an electrical power supply?
Question 17 What is mutual inductance? What device is used to achieve this goal? How do power companies use mutual inductance to reduce the amount of power lost to resistive heating in long-distance transmission lines?

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Robert · Accepted Answer

Question 1: 
How to induce electric current in the wire that moves through the magnetic field? 
Solution: 
This Question is part of the Electromagnetic Induction. According to the electromagnetic induction law 
given by Michael Faraday, an Electro Motive Force i.e. EMF is induced in the conductor moving inside 
the magnetic field. 
Here the most important thing to note is that following criterion must meet in order to induce the EMF 
inside the conductor. 
Criterion: 
1 – The material in which EMF is to be induced must be a conductor. 
2 – The Magnetic Field must be changing for the stationary conductor. 
3 – The conductor must be moving or rotating for the stationary magnetic field. 
4 – Both Magnetic field is changing and conductor is moving or rotating. 
So if any of the above criterion meet an EMF will be induced inside the conductor, and since the EMF is 
produced so if the conductor is a closed one than the current will be induced inside the conductor. 
Actually both the electric and magnetic fields are complimentary to each other, i.e. one can give rise to 
other, e.g. if the magnetic field is varied than it will lead to production of the electric field or EMF and if 
the a current is flown through a device than it leads to the generation of the magnetic field. 
The basic reason for this complimentary behavior can be explained as follows: 
When you move the conductor through the magnetic field than the number of magnetic lines cutting 
the conductor or passing through the conductor are also varying and due to which the electrical inertia 
of the internal electrons gets disturbed due to which to retain that electrical inertial state an 
electromotive force appears inside the conductor which in turn give rise to the electric current.

Question 16. How is it possible to induce a current in a wire that moves through a magnetic field without the use of a battery or an electrical power supply? Question 17 What is mutual inductance?...

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