1.

Frequency of electromagnetic wave is 25MHz. The value of electric field intensity at any point at any time in wave in wave is 6.3 Vm^(-1). The value of magnetic field at that point is …… Wb//m^(2).

Answer»

`3.9xx10^(-2)`
`2.52xx10^(-7)`
`2.1xx10^(-8)`
`7.5xx10^(-3)`

Solution :VELOCITY of electromagnetic wave is `3xx10^(8)m//s`
`therefore C=(E )/(B)`
`therefore B=(B)/(c )=(6.3)/(3xx10^(8))`
`therefore B=2.1xx10^(-8)T`


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