GEOLOGY

Detailed explanation-1: -Magnetic field lines are a visual representation of the invisible lines of force in a magnetic field. By convention, the lines trace the force from the north to south pole of a magnet. The distance between the lines indicates relative strength of the magnetic field.

Detailed explanation-2: -Magnetic field lines are invisible lines that map out the magnetic field around a magnet. Magnetic field lines spread out from one pole, curve around the magnet, and return to the other pole. The lines form complete loops from pole to pole and never cross.

Detailed explanation-3: -certain objects. The magnet repels an object by pushing it away or resisting it. A magnetic field is the area around the magnet where the force is in effect. The magnetic field is made up of invisible lines created by the movement of electrically charged particles. These are called magnetic field lines.

Detailed explanation-4: -The field represents the object generating it. Gravitational fields map gravitational forces, electric fields map electrical forces, and magnetic fields map magnetic forces.

Detailed explanation-5: -Magnetic field lines can be mapped out using a small compass. The compass is moved from point to point around a magnet, and at each point, a short line is drawn in the direction of the needle, as shown in Figure 20.10. Joining the lines together then reveals the path of the magnetic field line.