1 / 9

MAGNETIC FIELD DUE TO LONG STRAIGHT CONDUCTOR

MAGNETIC FIELD DUE TO LONG STRAIGHT CONDUCTOR. Lecture No.11 By. Sajid Hussain Qazi. Ampere’s Law. Andre Ampere. Remember: There are two ways to find the electric field around a charged object. Coulomb’s Law (Superposition) Gauss’s Law This is used for high symmetry cases.

magnar
Download Presentation

MAGNETIC FIELD DUE TO LONG STRAIGHT CONDUCTOR

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. MAGNETIC FIELD DUE TO LONG STRAIGHT CONDUCTOR Lecture No.11 By. SajidHussainQazi

  2. Ampere’s Law Andre Ampere

  3. Remember: There are two ways to find the electric field around a charged object. • Coulomb’s Law (Superposition) • Gauss’s Law • This is used for high symmetry cases.

  4. There are two ways to calculate magnetic field. • Biot-Savart Law • Ampere’s Law • Used for high symmetry cases.

  5. ds ´ I Ampere’s Law B • For small length elements ds on a closed path (not necessarily circular) • I is enclosed current passing through any surface bounded by the closed path. • Use where there is high symmetry

  6. Sign Convention for the Current in Ampere’s Law positive I r r The current I passing through a loop is positive if the direction of B from the right hand rule is the same as the direction of the integration (ds). I I negative I B B ds ds

  7. Field Outside a Long Straight Wire at a distance r from the center, r > R • The current is uniformly distributed through the cross section of the wire

  8. Field Inside a Long Straight Wire at a distance r from the center, r<R • Inside the wire, the current considered is inside the amperian circle Note the linear relationship of B with r

  9. Field Due to a Long Straight Wire • The field is proportional to r inside the wire • The field varies as 1/r outside the wire • Both equations are equal at r = R

More Related