Question

The peak value of the magnetic field, at a certain point, for an em wave is 9 nT. (It is given that μ₀ = 4π 0 x10^-7 SI units and c = 3 x 10⁸ ms^-1 ). The peak value, of its electric field, and its intensity, at the same point, would be (nearly)

(1) \(2.7 \frac{V}{m}\) and 4.8 x 10^-3 \(\frac{W}{m^2}\)

(2) \(5.4 \frac{V}{m}\) and 9.7 x 10^-3 \(\frac{W}{m^2}\)

(3) \(5.4\frac{V}{m}\) and 4.8 x 10^-3 \(\frac{W}{m^2}\)

(4) \(2.7\frac{V}{m}\) and 9.7 x 10^-3 \(\frac{W}{m^2}\)

Answer 1

(4) \(2.7\frac{V}{m}\) and 9.7 x 10^-3 \(\frac{W}{m^2}\)

E₀ = Peak value of electric field = cB₀