Compass- Chapter 2 Flashcards
What happens when a bar of ferromagnetic material is exposed to an external magnetic field
molecules will be induced to align so that the bar itself demonstrates magnetic properties.
What colour is north depicted as
blue
What is the angle between the Magnetic meridian and the Compass North called?
Question 5
Deviation
What can a ship acquire during the process of its construction
permanent magnetic poles
What is magnetic variation caused by
the ships permanent and induced magnetic fields
What does the first law of magnetism state
when two magnets are placed in close proximity to one another then like poles repel and unlike poles attract each other.
Dipole poles
refer to the two distinct poles of a magnet or a magnetic field, specifically the north pole and the south pole
Lines of variation are known as what
Isogonals
Magnetic dip
refers to the angle at which a magnetic field lines intersect the horizontal plane.
Where is magnetic dip strongest
strongest at the magnetic poles of the Earth
At the magnetic poles (North and South), the magnetic dip reaches 90 degrees. This means the magnetic field lines are perpendicular to the surface of the Earth and point directly downward into the ground at the North Magnetic Pole and upward at the South Magnetic Pole.
Where is magnetic dip weakest
magnetic equator
the dip is 0 degrees, meaning the magnetic field lines are parallel to the Earth’s surface.
What is the aclinic line
magnetic equator
Isoclinic lines
imaginary lines on a map or globe that connect points of equal magnetic dip (or inclination).
These lines show the angle at which the Earth’s magnetic field lines intersect the surface of the Earth, measured from the horizontal.
H-force
refers to the horizontal component of the Earth’s magnetic field.
This horizontal force is responsible for aligning the needle of a compass in the direction of the magnetic north.
Z-force
refers to the vertical component of the Earth’s magnetic field. It represents the force that pulls the magnetic field lines either downward or upward, depending on the hemisphere you’re in.
