Em Waves Question 109
Question: In an apparatus, the electric field was found to oscillate with an amplitude of $ 18V/m $ . The magnitude of the oscillating magnetic field will be
Options:
A) $ 4\times {{10}^{-6}}T $
B) $ 6\times {{10}^{-8}}T $
C) $ 9\times {{10}^{-9}}T $
D) $ 11\times {{10}^{-11}}T $
Show Answer
Answer:
Correct Answer: B
Solution:
[b] $ c=\frac{E}{B}\Rightarrow B=\frac{E}{c}=\frac{18}{3\times 10^{8}}=6\times {{10}^{-8}}T. $
BETA
