✓ 1 MARKS
MCQ
🔥 APPEARED IN 3 BOARD SETS
An electromagnetic wave passes from vacuum into a dielectric medium with relative electrical permittivity $(3/2)$ and relative magnetic permeability $(8/3)$. Then, its
A
wavelength is doubled and frequency remains unchanged.
B
wavelength is doubled and frequency is halved.
C
wavelength is halved and frequency remains unchanged.
D
wavelength and frequency both will remain unchanged.
01 // VERIFIED BOARD OCCURRENCES
| Year | Paper Code | Set | Position |
|---|---|---|---|
| CBSE 2026 | Series 55-1 | Set 1 | Question 5 |
| CBSE 2026 | Series 55-1 | Set 2 | Question 11 |
| CBSE 2026 | Series 55-1 | 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)