A) \[18.9\times {{10}^{-8}}\text{ }\widehat{k}T\]
B) \[2.1\times {{10}^{-8}}\text{ }\widehat{k}T\]
C) \[18.9\times {{10}^{8}}\text{ }\widehat{k}T\]
D) \[6.3\times {{10}^{-8}}\text{ }\widehat{k}T\]
Correct Answer: B
Solution :
\[\overrightarrow{E}\,\,\,=\,\,\,6.3\,\,\overrightarrow{j}\,\,V/m\] \[\because \,\,\,\,\,\left| \overrightarrow{E} \right|\,\,\,\,\,=\,\,\,\,\left| \overrightarrow{B} \right|\,\,\,.\,\,\,C\] \[\Rightarrow \,\,\,\,\left| \overrightarrow{B} \right|\,\,\,\,=\,\,\,\frac{6.3}{3\times {{10}^{8}}}\,\,\,\,=\,\,\,2.1\times {{10}^{-8}}T\] Direction of wave is in direction of \[\overrightarrow{E}\text{ }\times \text{ }\overrightarrow{B}\] So, option is correct
You need to login to perform this action.
You will be redirected in
3 sec
