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Two similar circular co-axial loops carry equal current in the same direction. If the loops be brought nearer, the currents in them will
- a)Change direction
- b)Decrease
- c)Increase
- d)Remain same
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
Two similar circular co-axial loops carry equal current in the same di...
The answer is B. Its Faraday's law of magnetic induction. As the loops are brought closer to each other, the magnetic field from one loop to another increases, increasing the flux. The loops will want to counter this increase in flux, creating a back EMF that will oppose the original current. This reduces the current in each loop.
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Most Upvoted Answer
Two similar circular co-axial loops carry equal current in the same di...
When the two loops are brought together, the flux linking the two loops increases. By Lenz's law a current will be induced such that it opposes this change of flux . Therefore to oppose the increase in flux, the current in the two loops will decrease, so the flux decreases.
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Two similar circular co-axial loops carry equal current in the same di...
Explanation:
When two similar circular co-axial loops carry equal current in the same direction, they create a magnetic field around them. This magnetic field follows certain rules, known as the right-hand thumb rule, which states that if you wrap your fingers around the wire in the direction of the current flow, your thumb will point in the direction of the magnetic field.
Effect of bringing the loops closer:
When the loops are brought closer, the magnetic field lines produced by one loop will intersect the other loop. This interaction between the magnetic fields will cause a change in the magnetic flux passing through each loop. According to Faraday's law of electromagnetic induction, a change in magnetic flux induces an electromotive force (emf) in a conductor, which in turn can cause a change in the current.
Lenz's law:
Lenz's law states that the direction of the induced current is such that it opposes the change in magnetic flux that caused it. In this case, as the loops are brought closer, the magnetic flux passing through each loop increases. As a result, the induced current in each loop will flow in such a direction as to oppose this increase in magnetic flux.
Effect on the current in the loops:
Since the induced current in each loop opposes the increase in magnetic flux, the net effect is a decrease in the current in the loops. This means that the current in the loops will decrease when they are brought closer.
Therefore, the correct answer is option 'B' - the currents in the loops will decrease when they are brought nearer.
When two similar circular co-axial loops carry equal current in the same direction, they create a magnetic field around them. This magnetic field follows certain rules, known as the right-hand thumb rule, which states that if you wrap your fingers around the wire in the direction of the current flow, your thumb will point in the direction of the magnetic field.
Effect of bringing the loops closer:
When the loops are brought closer, the magnetic field lines produced by one loop will intersect the other loop. This interaction between the magnetic fields will cause a change in the magnetic flux passing through each loop. According to Faraday's law of electromagnetic induction, a change in magnetic flux induces an electromotive force (emf) in a conductor, which in turn can cause a change in the current.
Lenz's law:
Lenz's law states that the direction of the induced current is such that it opposes the change in magnetic flux that caused it. In this case, as the loops are brought closer, the magnetic flux passing through each loop increases. As a result, the induced current in each loop will flow in such a direction as to oppose this increase in magnetic flux.
Effect on the current in the loops:
Since the induced current in each loop opposes the increase in magnetic flux, the net effect is a decrease in the current in the loops. This means that the current in the loops will decrease when they are brought closer.
Therefore, the correct answer is option 'B' - the currents in the loops will decrease when they are brought nearer.
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Two similar circular co-axial loops carry equal current in the same direction. If the loops be brought nearer, the currents in them willa)Change directionb)Decreasec)Increased)Remain sameCorrect answer is option 'B'. Can you explain this answer?
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