Two identical circular current-carrying loops, placed

Q: Answer-Two identical circular current-carrying loops, placed coaxially, carry the same current i in the sam...

Given Two identical circular loops Carry same current i in same direction Placed coaxially on the same axis Now, when two loops carrying current in the same direction are brought closer , each loops magnetic field supports the other loops magnetic field. Thus, the mutual inductance MMM between the loops increases . Now, by Lenzs law Any change that tends to increase magnetic flux opposes the original current. So, when mutual inductance MMM increases, to oppose the increased flux, an induced emf is created which tries to decrease the original current. Thus the current in both loops will decrease.

coaxially, carry the same current i in the same direction . As the loops are brought closer to each other, what will happen to the current in each loop?

A The current in both loops will decrease Correct Answer Incorrect Answer

B The current in both loops will increase Correct Answer Incorrect Answer

C The current in each loop will remain unchanged Correct Answer Incorrect Answer

D The current will increase in one and decrease in the other Correct Answer Incorrect Answer

Solution

Given:

Two identical circular loops
Carry same current i in same direction
Placed coaxially (on the same axis)

Now, when two loops carrying current in the same direction are brought closer , each loop's magnetic field supports the other loop’s magnetic field.
Thus, the mutual inductance MMM between the loops increases . Now, by Lenz’s law :

Any change that tends to increase magnetic flux opposes the original current.
So, when mutual inductance MMM increases, to oppose the increased flux, an induced emf is created which tries to decrease the original current.

Thus the current in both loops will decrease.

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AAI ATC JE

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