NCERT Solutions for Chapter: Electromagnetic Waves, Exercise 2: VSA

Why is the orientation of the portable radio with respect to broadcasting station important?

Why does microwave oven heats up a food item containing water molecules most efficiently?

The charge on a parallel plate capacitor varies as $q=q_0\cos 2\pi \nu t$. The plates are very large and close together (area $=A$. separation $=d$). Neglecting the edge effects, find the displacement current through the capacitor?

A variable frequency AC source is connected to a capacitor. How will the displacement current change with decrease in frequency?

The magnetic field of a beam emerging from a filter facing flood light is given by $B_0=12\times {10}^{-8} \sin (1.20\times {10}^{7}z-3.60\times {10}^{15}t)T$. What is the average intensity of the beam?

Pointing vectors $S$ is defined as a vector whose magnitude is equal to the wave intensity and whose direction is along the direction of wave propagation. Mathematically, it is given by$S=\frac{1}{\mu }E\times B$. Show the nature of$S$ vs $t$ graph.

Professor C.V Raman surprised his students by suspending freely a tiny light ball in a transparent vacuum chamber by shining a laser beam on it. Which property of electromagnetic waves was he exhibiting? Give one more example of this property.