CBSE 2024 · Region 2 · Set 3 · Q7 · 1 mark

In four regions I, II, III and IV, the magnetic field is given by : I. $\displaystyle \mathrm{B}_{\mathrm{y}}=\mathrm{B}_{0} \sin \mathrm{kz}$ II. $\displaystyle \mathrm{B}_{\mathrm{y}}=\mathrm{B}_{0} \cos \mathrm{kz}$ III. $\displaystyle \mathrm{B}_{\mathrm{y}}=\mathrm{B}_{0} \sin (\mathrm{kz}-\omega \mathrm{t})$ IV. $\displaystyle \mathrm{B}_{\mathrm{y}}=\mathrm{B}_{0} \sin \mathrm{kz}+\mathrm{B}_{0} \cos \mathrm{kz}$ The electromagnetic wave will exist in the region :

CBSE Class 12 Physics past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.