✓ 3 MARKS
Derivations
🔥 APPEARED IN 3 BOARD SETS
Derive an expression for the magnetic field $\vec{B}$, due to a circular coil of N turns, each of radius $r$ carrying current $I$, at a distance '$x$' from the centre along its axis.
01 // VERIFIED BOARD OCCURRENCES
| Year | Paper Code | Set | Position |
|---|---|---|---|
| CBSE 2026 | Series 55-2 | Set 1 | Question 28 |
| CBSE 2026 | Series 55-2 | Set 2 | Question 27 |
| CBSE 2026 | Series 55-2 | Set 3 | Question 23 |
02 // OFFICIAL CBSE MARKING SCHEME BREAKDOWN
- Step 1: Stating the fundamental formula / law statement (+1 Mark)
- Step 2: Intermediate mathematical substitution or proof steps (+1 Mark)
- Step 3: Correct final value or conclusion with mandatory SI units (+1 Mark)