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:

  1. Peak value of electric field

$$ E _0=B _0 c=20 \times 10^{-9} \times 3 \times 10^{8}=6 V / m $$



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