Q21. A circular loop has its radius increasing at a rate of 2 m/s. The loop is placed perpendicular to a constant magnetic field of 0.1 Wb/\(m^2\) . When the radius of the loop is 2m, the emf induced in the loop will be

Q22. The vector product of electric intensities E and magnetic field intensities H at any point is a measure of rate of energy flow per unit area at that point. The above statement is known as \(_{-------------}\)

Q23. Two infinite strips of width \(w\) meter in the x-direction as shown in Figure, are carrying forward and return currents of \(+I\) and \(–I\) in the z-direction. The strips are separated by a distance of \(x\) meter. The inductance per unit length of the configuration is measured to be \(L\: \frac{H}{m}\). If the distance of separation between the strips is now reduced to \(\frac{x}{2}\) meter, the inductance per unit length of the configuration is <br><br>

Q24. Which of the following is not a Maxwell’s equation?

Q25. Wave attenuation is given as \(_{-------------}\) .

Q26. The velocity of wave propagation in a conductor with frequency \(6 \times 10^8 \:rad/sec\) and phase constant of \( 3 \times 10^8 \:units \) is__________.