Solar radiation is composed of electromagnetic (EM) waves. EM waves are transverse waves where the electric and magnetic fields oscillate perpendicular to the direction of wave propagation. Since solar radiation is an EM wave, and EM waves are transverse in nature, the correct answer is: Transverse EM wave
In the given circuit, the electric currents through $15\, \Omega$ and $6 \, \Omega$ respectively are

A magnet suspended in a uniform magnetic field is heated so as to reduce its magnetic moment by 19%. By doing this, the time period of the magnet approximately