Which instrument can be used to give the direction of magnetic field lines at any given point?

Correct option is C

The correct answer is (c) Magnetic Compass

A magnetic compass is an instrument used to determine the direction of magnetic field lines at any given point.

The compass needle aligns itself with the magnetic field, and by observing the orientation of the needle, we can infer the direction of the magnetic field at that location.

The needle of the compass points towards the magnetic north, which is aligned with Earth's magnetic field lines, providing the direction of the local magnetic field.

Information Booster:

• The magnetic field lines are invisible lines that represent the direction of the magnetic force. They emerge from the north pole of a magnet and curve around to the south pole.

• Magnetic North: The needle points toward the Earth's magnetic north pole, which is different from the geographic North Pole.

Applications of Magnetic Compass:

• Navigation: Used in maritime, aviation, and land navigation for determining direction.
• Orientation: Helps determine bearings and headings for travel, especially when other references (like landmarks or GPS) are unavailable.

Additional Knowledge:

1. A solenoid is a coil of wire, often used to create a uniform magnetic field when an electric current passes through it. While it produces a magnetic field, it is not used to measure or indicate the direction of an external magnetic field. Solenoids are often used in electromagnets, actuators, and other devices.
2. A generator is an electrical machine that converts mechanical energy into electrical energy. It works on the principle of electromagnetic induction but is not designed to indicate the direction of a magnetic field.
3. An electric motor is a device that converts electrical energy into mechanical energy. While it interacts with magnetic fields to produce motion, it does not measure or give the direction of magnetic field lines.