1) 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 Answer: Option BExplanation: Peak value of electric field $E_{0}=B_{0}c= 20\times10^{-9}\times 3\times10^{8}$ =6 V/m
