Soru

Zorluk: OrtaMagnetism and Earth's Magnetic Field

Determine whether the following statement is true or false: When a bar magnet is placed in the Earth's magnetic field with its north pole pointing towards geographic North, the neutral points formed by the mutual cancellation of the magnet's field and the Earth's horizontal field lie along the magnet's equatorial line (broadside-on position).

Cevap: Cevap

Cevap

True. When a bar magnet has its north pole pointing North, the magnetic field along its equatorial (broadside-on) line points South, opposing the Earth's horizontal magnetic field to create neutral points.
The statement is correct because neutral points are formed at positions where the external magnetic field of a magnet is equal in magnitude and opposite in direction to the Earth's horizontal magnetic field component (BHB_H). When the north pole of a bar magnet points North, its field along the broadside-on (equatorial) axis is directed South (opposite to BHB_H), leading to field cancellation and the creation of two neutral points on that axis.

Adım Adım Çözüm

1
Identify the direction of the Earth's horizontal magnetic field component (BHB_H).
Earth's horizontal field (BHB_H) acts along the magnetic meridian from magnetic South to magnetic North.
Neutral points can only occur where two magnetic fields act in opposite directions and have equal magnitudes.
2
Determine the direction of the bar magnet's magnetic field on its broadside-on (equatorial) axis.
Outside the magnet, magnetic flux lines travel from North to South. Along the broadside-on line, the magnet's field points southward.
Field lines curve from the north pole back into the south pole externally.
3
Compare the magnetic field directions on the broadside-on axis.
The southward field of the magnet opposes the northward Earth field (BHB_H). At points where their magnitudes match, the net magnetic field becomes zero.
Vector cancellation requires antiparallel vectors of equal magnitude.

Anahtar Kavram

Neutral Points of a Bar Magnet in Earth's Magnetic Field
Bu soruyu puanla