The shape of magnetic field lines produced (i) inside a solenoid (ii) around a straight conductor, both carrying current of the same magnitude are, respectively :

Question

Two identical circular loops \(P\) and \(Q\) each of radius \(r\) are lying in parallel planes such that they have common axis. The current through \(P\) and \(Q\) are \(I\) and \(4I\) respectively in clockwise direction as seen from \(O\). The net magnetic field at \(O\) is:

Answer 1

Inside a solenoid, the magnetic field is uniform, with parallel and straight field lines. Around a straight current-carrying conductor, the magnetic field lines are concentric circles. This follows the right-hand thumb rule. Thus: Solenoid: straight field lines; Straight conductor: circular field lines. The correct answer is (a) straight and circular.

The shape of magnetic field lines produced (i) inside a solenoid (ii) around a straight conductor, both carrying current of the same magnitude are, respectively :

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The Correct Option is A

Solution and Explanation

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