Two identical coaxial circular loops carry a current i each circulatin...
Ans.
Option (a)
As coils approach each other, the flux linked with each coil increases. A current will be induced in each coil which will try to decrease the flux. This implies induced current in each coil will be opposite to initial current. So, current in each coil decreases as the coils approach each other.
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Two identical coaxial circular loops carry a current i each circulatin...
Explanation:
When two identical coaxial circular loops carry a current i each circulating in the same direction and approach each other, the magnetic field produced by each loop will interfere with the other. This interference will cause a change in the magnetic field, which in turn will change the current flowing through each loop.
Reasoning:
The magnetic field produced by each loop is proportional to the current flowing through it. When the loops approach each other, the magnetic field produced by each loop will interfere with the other. This interference will cause a change in the magnetic field, which in turn will change the current flowing through each loop.
When the loops approach each other, the magnetic field lines from one loop will begin to intersect with the other loop. This will cause a change in the magnetic field, which will produce an induced EMF in each loop. The induced EMF will oppose the current flowing through the loop, causing the current to decrease.
Conclusion:
Hence, the correct answer is option 'A'. The current in each loop will decrease when the two identical coaxial circular loops carry a current i each circulating in the same direction and approach each other. This is because the magnetic field produced by each loop will interfere with the other, causing a change in the magnetic field which will produce an induced EMF in each loop, opposing the current flowing through the loop, and causing the current to decrease.