✓ 1 MARKS
MCQ
🔥 APPEARED IN 3 BOARD SETS
The ratio of amplitude of electric field to the amplitude of the magnetic field associated with an electromagnetic wave propagating in glass ($n = 1.5$) is :
A
$3 \times 10^8 \text{ ms}^{-1}$
B
$2 \times 10^8 \text{ ms}^{-1}$
C
$3.3 \times 10^{-9} \text{ ms}^{-1}$
D
$5 \times 10^{-9} \text{ ms}^{-1}$
01 // VERIFIED BOARD OCCURRENCES
| Year | Paper Code | Set | Position |
|---|---|---|---|
| CBSE 2026 | Series 55-4 | Set 1 | Question 7 |
| CBSE 2026 | Series 55-4 | Set 2 | Question 10 |
| CBSE 2026 | Series 55-4 | Set 3 | Question 2 |
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)