I. The direction of the galvanometer direction depends on the speed of the magnet. II. The degree deflection is proportional to the length of the inserted magnet. III. The faster you insert-retract the magnet the greater the degree of deflection. IV. The galvanometer deflection increases when the polarity of the inserted magnet is reversed.

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Bar Magnet

In physics, magnetism is a phenomenon exhibited by a magnetic substance that exerts either attractive or repulsive force. A bar magnet is either a rectangular or round and hollow fit comprised of ferromagnetic materials and has a fanciful attractive field surrounded by it.