Magnetic Effects of Electric Current

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The north pole of the compass will move towards the east. Using the right-hand thumb rule: thumb points in current direction (north to south), fingers curl eastward around the wire. The magnetic field…

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A compass needle is itself a small bar magnet. When brought near another magnet, it experiences magnetic force due to the magnetic field. Like poles repel and unlike poles attract, causing the needle …

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The iron filings arrange themselves in curved lines extending from the north pole to the south pole of the magnet. These lines represent magnetic field lines. The filings align because they become tem…

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The solenoid's magnetic field is 100 times stronger than a single loop. Each turn contributes equally to the field, and since all turns have current in the same direction, their fields add up. The fie…

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If two field lines intersected, it would mean at that point there are two different directions of magnetic field simultaneously. This is impossible because a compass needle at that point cannot point …

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Hold the conductor in your right hand with thumb pointing in the direction of current flow. Your fingers will naturally curl around the conductor in the direction of the magnetic field lines. The fiel…

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The rod will move to the right. The direction of force on a current-carrying conductor depends on both current direction and magnetic field direction. Reversing current reverses the force direction, a…

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Inside a solenoid, the magnetic field lines from all turns add up to form parallel, equally-spaced lines running from south to north pole internally. The field lines are straight and parallel, indicat…