Modern Physics 7 Question 34
35. The magnetic field in a travelling electromagnetic wave has a peak value of $20 nT$. The peak value of electric field strength is
(a) $3 V / m$
(b) $6 V / m$
(c) $9 V / m$
(d) $12 V / m$
(2013 Main)
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Solution:
- Peak value of electric field
$$ E _0=B _0 c=20 \times 10^{-9} \times 3 \times 10^{8}=6 V / m $$
