Question

The amplitude of the sinusoidally oscillating electric field of plane wave is $30 \frac{V}{M}$ Then the amplitude of magnetic field is

• A. $2 \times 10^{-9} T$
• B. $1 \times 10^{-7} T$
• C. $3 \times 10^{9} T$
• D. $5 \times 10^{-7} T$

Answer 1

Answer: (B)

$C=\frac{E_{0}}{B_{0}} \Rightarrow B_{0}=\frac{E_{0}}{c}$
$=\frac{30}{3 \times 10^{8}}=10 \times 10^{-8}=10^{-7}$