Magnetic Compass

What property of ferromagnetic materials allows them to become magnets?

• Conductivity

• Magnetization

• Permeability

• Susceptibility

What is the term for the angle between the Earth's magnetic field lines and the horizontal plane at a specific location?

• Angle of Attraction

• Magnetic Variation

• Angle of Dip

• Magnetic Inclination

What does "magnetic variation" represent in ship navigation?

• The rate of change of a magnetic field

• The difference between true north and magnetic north

• The strength of a ship's magnetism

• The angle of dip at the equator

Which component of the Earth's magnetic field primarily influences the alignment of a compass needle?

• Vertical component

• Horizontal component

• North component

• South component

How can the magnetic field of the Earth be represented in terms of vectors?

• As a scalar quantity

• As a single point

• As a series of dots

• As a vector with direction and magnitude

Which type of iron, 'hard' or 'soft,' retains magnetism after exposure to a magnetic field?

• Hard iron

• Soft iron

• Neither

• Both

What is the primary purpose of a compass on a ship?

• To indicate the ship's heading

• To find the ship's longitude

• To determine the ship's latitude

• To measure the ship's speed

What is the term for the division of the Earth's total magnetic field into horizontal and vertical components?

• Magnetic Dip

• Magnetic Equator

• Magnetic Susceptibility

• Magnetic Field Splitting

What is the slowly changing quantity that represents the difference between true north and magnetic north?

• Magnetic Inclination

• Magnetic Declination

• Magnetic Permeability

• Magnetic Susceptibility

In ship navigation, what does a compass needle primarily align itself with?

• The ship's speed

• The Earth's magnetic poles

• The resultant magnetic field

• The ship's longitude