Question

Which of the following physical properties of the Earth's mantle controls the transmission of geomagnetic signals from the core to the surface?

• A. electrical conductivity
• B. electrical voltage
• C. electric rotational energy
• D. electric current

Hint:

Magnetic signals travel through the mantle depending on its electrical conductivity.

Answer 1

The Correct Option is A

The electrical conductivity of the mantle determines how geomagnetic signals generated by the core are transmitted to the Earth's surface. Higher conductivity enables smoother transmission of magnetic variations and affects how magnetic field observations are interpreted.