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PhysicsJEE Main 21 Jan 2026, Shift 2·Q21·Numerical·Easy–moderate

Electromagnetic Waves · EM waves

An electromagnetic wave of frequency 100 MHz propagates through a medium of conductivity, σ=10\sigma = 10 mho/m. The ratio of maximum conducting current density to maximum displacement current density is . [Take 14πϵ0=9×109 Nm2/C2]\left[\text{Take } \dfrac{1}{4\pi\epsilon_0} = 9\times10^{9}\ \mathrm{Nm^2/C^2}\right]

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