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Describe and interpret drawings of magnetic fields around permanent magnets and current-carrying wires. Calculate the magnitude and direction of magnetic force in a magnetic field and the force on a current-carrying wire in a magnetic field.
- 14.4 Sound Interference and Resonance
Resonance and Beats. Sit in front of a piano sometime and...
- 22.1 The Structure of The Atom
Figure 22.10 An energy-level diagram plots energy vertically...
- 22.4 Nuclear Fission and Fusion
Figure 22.35 shows a simple diagram of how a thermonuclear...
- 8.3 Elastic and Inelastic Collisions
Elastic and Inelastic Collisions. When objects collide, they...
- 21.3 The Dual Nature of Light
Figure 21.10 shows a comet with two prominent tails. Comet...
- 15.1 The Electromagnetic Spectrum
The electric field is defined as the force per unit charge...
- 14.4 Sound Interference and Resonance
A pictorial representation of magnetic field lines is very useful in visualizing the strength and direction of the magnetic field. The direction of magnetic field lines is defined to be the direction in which the north end of a compass needle points.
Magnetic field lines are used to represent the strength and direction of a magnetic field. The direction of the magnetic field is shown using arrows. The strength of the magnetic field is shown by the spacing of the magnetic field lines.
Sketch magnetic field lines to understand which way the magnetic field points and how strong it is in a region of space. We have outlined the properties of magnets, described how they behave, and listed some of the applications of magnetic properties.
along the direction of the magnetic field produced by the magnet, as depicted in Figure 8.1.1. Figure 8.1.1 Magnetic field produced by a bar magnet Notice that the bar magnet consists of two poles, which are designated as the north (N) and the south (S). Magnetic fields are strongest at the poles. The magnetic field lines
Magnetic Fields and Field Strength. We already know that a magnetic material brought near a magnet will feel a force (eg it is attracted), so we define a magnetic field as: "The region around a magnet in which a magnetic material feels a force".
The field can be visualized by a set of magnetic field lines, that follow the direction of the field at each point. The lines can be constructed by measuring the strength and direction of the magnetic field at a large number of points (or at every point in space).
