The current flowing in two coaxial coils in the same direction. On increasing the distance between the two, the electric current will(a) Increase(b) Decrease(c) Remain unchanged(d) The information is incomplete
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I think d) is right option.
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Answer: (a) increases
Explanation:
The current is flowing through coaxial cables in same direction.
The distance between the coil is increased.
Thus the induced current in the coil will also increase.
Both the coils will now assist main current as the induced current is in same direction.
Also increasing flux will decrease flux which is opposed by increasing current.
Thus current in each coil will increase.
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