Earth’s Magnetic Field

Things to remember

• A freely suspended bar magnet always comes to rest in a north-south direction.
• Angle of declination and angle of dip are due to the effect of earth’s magnetism.
• Neutral points are obtained on the magnetic field of a magnet which is due to the combined effects of its magnetic field and earth’s magnetism.
• The vertical plane passing through the axis of a freely suspended magnet at a place is called the magnetic meridian
• The vertical plane passing through a place and the geographical north and south poles is called the geographic meridian at that place.