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What does the analog (similarity) of bar magnet's and solenoid's magnetic field lines suggest ? |
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Answer» Solution :The analogy (similarity) of the magnetic field lines of the bar magnet and solenoid is shown as follows: (i) A bar magnet MAY be thought of as a large number of circulating current in analog with a solenoid. (ii) CUTTING a bar magnet in HALF the each piece BEHAVE like an independent magnet. Cutting a solenoid from middle we get two smaller solenoids with weaker magnetic properties. (iii) Like a bar magnet, the magnetic lines in the solenoid are continuous emerging from one face of the solenoid and entering into the other face and form a closed loop. (iv) Like a bar magnet the magnetic field at POINT on the axis, the magnetic field of solenoid at point on axis is `B = (mu_(0) ) /( 4 pi) (2m)/( r^3)`. |
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