9. Think about this theory for a moment, if we have a magnet that is sitting ins
ID: 1864745 • Letter: 9
Question
9. Think about this theory for a moment, if we have a magnet that is sitting inside of a metal loop, but NOT moving, then what would we expect the induced voltage to be and why? 10. If we have a bar magnet, whose magnetic field strength is dependent on the distance then as soon as we move it, closer to the loop, then what are we changing and how would it affect the induced voltage? 11. When we increased the area of the loop, what did we increase, and how did it affect the induced voltage? 12. When we moved the magnet VERY slowly through the metal loop, did it have an effect on the induced voltage, why or why not?Explanation / Answer
9. Voltage is induced whenever there is change in current with respect to time. Now, a magnet that is sitting inside a metal, would not produce current changing with time. Hence by Faraday's law of electromagnetic induction, there is no induced voltage.
10. Flux = Magnetic Field * Area
Rate of change of fux gives the induced voltage.
In this case we are changing the magnetic field strength when we move the magnet, hence there will be induced voltage.
Now B is inversely propotional to distance, hence as distance decreases, the induced voltage increases.
11. Flux = Magnetic Field * Area
As area is increased, flux increases, and hence the induced voltage too.
12. It should change the induced voltage, and the current is changing, even though slowly.
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