✓ 3 MARKS
Short Answer
🔥 APPEARED IN 3 BOARD SETS
(a) The figure given below shows three straight long parallel conductors (1), (2) and (3) kept in x-y plane, carrying currents 2I, I and 3I respectively as shown in figure. Find the magnitude and direction of : (i) net magnetic field at a point on conductor (1) and (ii) net magnetic force acting on unit length of conductor (1), due to conductors (2) and (3).
01 // VERIFIED BOARD OCCURRENCES
| Year | Paper Code | Set | Position |
|---|---|---|---|
| CBSE 2026 | Series 55-4 | Set 1 | Question 23 |
| CBSE 2026 | Series 55-4 | Set 2 | Question 22 |
| CBSE 2026 | Series 55-4 | Set 3 | Question 24 |
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)