If `E` and `B` denote electric and magnetic fields respectively, which of the following is dimensionless?
If `E` and `B` denote electric and magnetic fields respectively, which of the following is dimensionless?
A. `sqrt(mu_(0)epsilon_(0))(E)/(B)`
B. `mu_(0)epsilon_(0)(E)/(B)`
C. `mu_(0)epsilon_(0)((B)/(E))^(2)`
D. `(E)/(epsilon_(0))(mu_(0))/(B)`
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Correct Answer - A
Speed of light, `c=(1)/(sqrt(mu_(0)epsilon_(0))), "Also, "(E)/(B)=c`
Therefore, `sqrt(mu_(0)epsilon_(0))(E)/(B)` is dimensionless.
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