e) What is a magnetic compass? How is it usefultshow that magnetism in a bar magnet is strongest at its pokes) How can you magnetise an iron needle?

e) What is a magnetic compass? How is it usefultshow that magnetism in

1.	e) What is a magnetic compass? How is it usefultshow that magnetism in a bar magnet is strongest at its pokes) How can you magnetise an iron needle?
Answer» <p>Themagnetic compasswas animportantadvance in navigation because it allowed mariners to determine their direction even if clouds obscured their usual astronomical cues such as the North Star. </p><p>It uses amagneticneedle that can turn freely so that it always points to the north pole of the Earth'smagneticfield.</p> <p>2. The magneticfield of abar magnet is strongestat eitherpoleofthe magnet. It is equallystrong at thenorthpole when compared withthesouthpole.</p><p>Theforce is weaker inthemiddle ofthe magnetand halfway betweenthe poleandthecenter.</p> <p>3. Stroke aneedlewith the north end of a bar magnet around 50 times, lifting between strokes. </p><p>Stroking from tail to tip pulls theneedle's ironatoms into alignment, turning theneedleinto a weak temporary magnet. </p><p>Attach themagnetised needleto your circle of cork with tack and carefully place it into a dish of water.</p>