Em Waves Question 88
Question: The figure shows graphs of the electric field magnitude E versus time t for four uniform electric fields, all contained within identical circular regions. Which of them is according to the magnitudes of the magnetic field?
Options:
A) A
B) B
C) C
D) D
Show Answer
Answer:
Correct Answer: C
Solution:
[c] $ \oint{\vec{B}.d},\vec{\ell }\sqrt{b^{2}-4ac}={\mu _{0}}{\in _{0}}\frac{d\phi }{dt} $ or $ B\times 2\pi r={\mu _{0}},{\in _{0}},A( \frac{dE}{dt} ) $
$ \
Therefore B\propto ( \frac{dE}{dt} ) $
BETA
