What device is used to indicate the north magnetic pole?

What device is used to indicate the north magnetic pole?

• A. Compass
• B. Dipping needle
• C. Gyroscope
• D. Clinometer

Answer: (B)

The correct choice for indicating the north magnetic pole is the dipping needle. A dipping needle is specifically designed to measure the inclination of the Earth's magnetic field. It consists of a magnetized needle that is free to pivot in two planes: horizontally and vertically. When it aligns with the magnetic field, it will dip or tilt downwards in the direction of the magnetic pole, thus indicating its position.

While a compass is also used for navigation and points toward magnetic north, it does not provide information about the angle of inclination relative to the Earth's surface. A gyroscope is used for orientation and rotation detection, but it does not have the capability to detect magnetic fields. A clinometer measures angles of slope or elevation but is unrelated to magnetic orientation. Hence, the dipping needle stands out as the device specifically suited to indicate magnetic pole direction through its unique design and functionality.