Physics · 2025
NEET 2025 · 4 May · Code 45 · Q9
The electric field in a plane electromagnetic wave is given by E_z=60 cos (5 x+1.5 × 10^9 t) V / m. Then expression for the corresponding magnetic…
The electric field in a plane electromagnetic wave is given by
$$E_z=60 \cos \left(5 x+1.5 \times 10^9 t\right) \mathrm{V} / \mathrm{m} .
$$
Then expression for the corresponding magnetic field is (here subscripts denote the direction of the field) :
Official answer
From NTA’s final answer key for this paper.
(1)
$\displaystyle B_y=2 \times 10^{-7} \cos \left(5 x+1.5 \times 10^9 t\right) T$
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NEET (UG) 2025 Physics question, with the answer from NTA’s final answer key. Where our answers come from.