Question:
In shown fig, the circular loop of wire is moved with velocity towards the infinite current carrying wire. Then
In shown fig, the circular loop of wire is moved with velocity towards the infinite current carrying wire. Then
Updated On: Apr 27, 2024
- no current is induced in loop
- current is induced in loop clockwise
- current is induced in loop anticlockwise
- extra charges are induced on the wire loop
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The Correct Option is B
Solution and Explanation
Mganetic field at the centre of the circular loop increases as it moves towards the current carrying wire as we know it varies inversely with the distance. Therefore, induced current in the loop should be such that it can reduce the increased magnetic field. This is possible only when the induced current is clockwise.
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Concepts Used:
Lenz’s law
Lenz’s law states that the induced electromotive force with different polarities induces a current whose magnetic field opposes the change in magnetic flux through the loop in order to ensure that original flux is maintained through the loop when current flows in it.
It depends on the principle of conservation of energy and Newton’s third law. To determine the direction of the induced current is most convenient method . Induced current states that he direction of an induced current is always such as to oppose the change in the circuit or the magnetic field that produces it.
Lenz’s Law Formula
The Lenz’s Law is reflected in the formula of Faraday’s law. Here the negative sign is contributed from Lenz’s law. The expression is –
Where,
