In a bicycle dynamo,does 1. The permanent magnet surrounds a conducting coil 2. The conducting coil rotates when the rear wheel
2 answers:
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Answer:
The current of the outer coil is
Explanation:
From the question we are told that
The number of turns of the inner coil is
The radius of the inner coil is
The current of the inner coil is
The number of turns of the outer coil is
The radius of the outer coil is
Generally the net magnetic field is mathematically represented as
Now from told that the net magnetic field is common
So
Here is the permeability of free space
making the subject
substituting values
A magnetic field is a mathematical description of the magnetic influence of electric currents and magnetic materials. The magnetic field at any point is specified by two values, the direction and the magnitude; such that it is a vector field. Mathematically it is described as,
Here
= Permeability at free space constant
= Current at each object
d = Distance to the center point of the two object
Two magnetic field due to the current in the same directions then is,
Replacing,
Therefore the correct answer is E.