Question

a sound of frequency is the hertz . hertz is the same as s-1 , i.e ,1/second .if the density at a place in medium makes 100 oscillation per second , the frequency is 10 Hz​

Answer 1

an electric dipole is kept first to the left and then to the right of a negatively charged infinite plane sheet having a uniform surface charge density. The arrows p1 and p2 show the directions of its electric dipole moment in the two cases. Identify for each case, whether the dipole is in stable or unstable equilibrium.