Match the following Columns
| Column I | Column II |
|---|---|
| (A) Dielectric ring uniformly charged | (P) Time independent electrostatic field out of system |
| (B) Dielectric ring uniformly charged rotating with angular velocity | (Q) Magnetic field |
| (C) Constant current in ring | (R) Induced electric field |
| (D) | (S) Magnetic moment |
Answer: A → I, B → II, B → IV, C → II, C → IV, D → II, D → III, D → IV
Solution
(A) Dielectric ring uniformly charged: Produces a static electric field. Matches (P).
(B) Dielectric ring uniformly charged rotating with angular velocity ω: Rotating charge constitutes a current, producing a magnetic field and magnetic moment. Matches (Q) and (S).
**(C) Constant current in ring :** Steady current produces a magnetic field and has a magnetic moment. Matches (Q) and (S).
**(D) :** Time-varying current produces a time-varying magnetic field, which induces an electric field (Faraday's law). Also has a time-varying magnetic moment. Matches (Q), (R), and (S).
Pairs: (A)→(P), (B)→(Q),(S), (C)→(Q),(S), (D)→(Q),(R),(S)
(B) Dielectric ring uniformly charged rotating with angular velocity ω: Rotating charge constitutes a current, producing a magnetic field and magnetic moment. Matches (Q) and (S).
**(C) Constant current in ring :** Steady current produces a magnetic field and has a magnetic moment. Matches (Q) and (S).
**(D) :** Time-varying current produces a time-varying magnetic field, which induces an electric field (Faraday's law). Also has a time-varying magnetic moment. Matches (Q), (R), and (S).
Pairs: (A)→(P), (B)→(Q),(S), (C)→(Q),(S), (D)→(Q),(R),(S)
JEE Advanced · 2006 · 09 Apr 2006 · Match the columns