The electric in an electromagetic wave is given by E=(100 N/C)`sinomega(t-(X)/(C ))`. If the energy contained in a cylinder of coss-section `10 cm^(2)` and length 50 cm along the X-axis is `4.4xx10^(-8)J//m^(3)`, then find intensity of the wave.A. `12.4 W//m^(3)`B. `13.2 W//m^(3)`C. `15.7 W//m^(3)`D. `11.9W//m^(3)`

The electric in an electromagetic wave is given by E=(100 N/C)`sinomeg

1.	The electric in an electromagetic wave is given by E=(100 N/C)`sinomega(t-(X)/(C ))`. If the energy contained in a cylinder of coss-section `10 cm^(2)` and length 50 cm along the X-axis is `4.4xx10^(-8)J//m^(3)`, then find intensity of the wave.A. `12.4 W//m^(3)`B. `13.2 W//m^(3)`C. `15.7 W//m^(3)`D. `11.9W//m^(3)`
Answer» (b) `l=(1)/(2)epsiE_(0)^(2)c=(4.4xx10^(-8))xx(3xx10^(8))=132 W//m^(2)`

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