By which instrument can the presence of a mag | vedclass

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(D) magnetic needle (or compass needle) is a small magnet that aligns itself with the direction of a magnetic field.When placed in a region where a ma

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Magnetic needle

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(D) magnetic needle (or compass needle) is a small magnet that aligns itself with the direction of a magnetic field.When placed in a region where a magnetic field exists,the magnetic needle experiences a torque and deflects from its original position.This deflection indicates the presence of a magnetic field.While a galvanometer can also detect small currents,the most direct and fundamental instrument used to detect the presence of a magnetic field is a magnetic needle.

By which instrument can the presence of a magnetic field be determined?

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