Question

The electric field in an electromagnetic wave in vacuum is given by : E⃗ = (6·3 N/C) [cos (1·5 rad/m) y + (4·5 × 10⁸ rad/s) t] î

The phase difference between electric field E→ and magnetic field B→ in an electromagnetic wave propagating along z-axis is –

The electric field E associated with an electromagnetic wave is represented by Ey = E0 sin (kx – ωt). Which of the following statements is correct ?

Explain the following, giving proper reason : (a) During charging of a capacitor, displacement current exists in the capacitor. But there is no displacement current when it gets fully charged. (b) The frequency of microwaves in ovens matches with the resonant frequency of water molecules. (c) Infrared waves are also known as heat waves.