Magnetic Effects of Electric Current · Science, chapter 12
Read the section map, ask questions about this chapter, run the concept animations, then take a quiz and see which sections to go back to.
The samjho API is not answering
Tried http://localhost:8000 — Could not reach the samjho API at http://localhost:8000.
The chapter list on this page is still real: it was read from /var/task/data/syllabus/class10.json on this machine, which ships with the repo. Asking questions and taking quizzes need the API, so those are unavailable until it is running.
Ingest state of chapter 12 is unknown
samjho could not establish whether this chapter's text has been ingested, so it will not claim either way. Could not ask the API (Could not reach the samjho API at http://localhost:8000.) Chapter detail request failed: Could not reach the samjho API at http://localhost:8000.
Sections of this chapter
Every anchor here is a citation target: a chip in an answer links straight to #section-<no>.
- §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
Ask about this chapter
Answers are built only from the passages retrieved from the ingested copy of your book for this chapter. If they do not cover your question, samjho says so instead of guessing.
Questions this chapter's sections suggest
Built from the section headings of this chapter, so they are always about something the chapter actually contains.
No questions asked in this session yet.
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.
Your attempts on this chapter
Checking your saved attempts…
Keyed on no id — an id created in this browser, not an account. Clearing site data clears this history.