Chapter 12. Magnetic Effects of Electric Current
7 sections · about 13 pages in the Science book (jesc112.pdf). Section anchors below are the targets of the citation chips you get back from an answer.
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Sections
- §12.1MAGNETIC FIELD AND FIELD LINES — book page 2
- §12.2MAGNETIC FIELD DUE TO A CURRENT-CARRYING CONDUCTOR — book page 3
- §12.2.1Magnetic Field due to a Current through a Straight — book page 4
- §12.2.2Right-Hand Thumb Rule — book page 5
- §12.2.3Magnetic Field due to a Current through a — book page 6
- §12.2.4Magnetic Field due to a Current in a Solenoid — book page 7
- §12.4DOMESTIC ELECTRIC CIRCUITS — book page 10
Study this chapter — ask questions and take the quizGo straight to the quiz
Concept animations for this chapter
Interactive explanations, drawn in the page — no video, no external scripts. Each one is keyboard operable, has a “what to notice” caption, and a “try this” prompt that changes what it shows.
Magnetic field lines around a straight current-carrying conductor
conceptId: magnetic-field-lines
What to notice: the field circles the wire with B = μ₀I/(2πr) — at 2.0 cm it is 50.0 µT, and moving the probe out to 4.0 cm halves it, because doubling r halves B.
Try this: set I = 4 A and r = 2 cm, note the field, then double r to 4 cm and double I back to 8 A — you get the same number twice, because B depends on I/r. Field lines are drawn at radii stepping by a constant ratio (×1.57) so equal flux passes between neighbours; the drawing is a cross-section of an ideal infinitely long straight wire and does not model the field of the connecting leads.
computed field at the probe: 50.00 µT from 5.0 A at 2.0 cm
10 further animations in the registries belong to other chapters.