Lenz’s law: loops entering and leaving a field (Example 6.4)लेंज़ नियम: क्षेत्र में प्रवेश करते और बाहर निकलते लूप (उदाहरण 6.4)Lenz’s law: loops entering and leaving a field (Example 6.4)

NCERT Fig 6.7 (our drawing) · Class 12 Physics · Chapter 6 · interactive diagram

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Parts and what they mean

Field region: B into the page (क्षेत्र: B पृष्ठ के अंदर) — Uniform field normal to the loops, pointing away from the reader (⊗).
(i) Rectangular loop abcd entering ((i) प्रवेश करता आयताकार लूप abcd) — Flux (into page) increases.
(i) Induced current along bcdab ((i) प्रेरित धारा bcdab के अनुदिश) — Anticlockwise on the page → its field points out of the page, opposing the increase.
(ii) Triangular loop abc leaving ((ii) बाहर निकलता त्रिभुजाकार लूप abc) — Flux decreases.
(ii) Induced current along bacb ((ii) प्रेरित धारा bacb के अनुदिश) — Clockwise → its field points into the page, trying to keep the flux.
(iii) Irregular loop abcd leaving ((iii) बाहर निकलता अनियमित लूप abcd) — Flux decreases.
(iii) Induced current along cdabc ((iii) प्रेरित धारा cdabc के अनुदिश) — Clockwise, again opposing the decrease.
Velocity (i): into the field (वेग (i): क्षेत्र के अंदर) — Current flows only while the loop is partly inside.
Velocity (ii): out of the field (वेग (ii): क्षेत्र से बाहर) — No current once the loop is fully outside.
Velocity (iii): out of the field (वेग (iii): क्षेत्र से बाहर) — No current while a loop is completely inside or outside.

Original diagram drawn by Simple Learning Hub, based on NCERT Fig 6.7 (our drawing). Report a mistake