Solved 9702/12/m/j/23

physics with sir saeed akhtar.A longitudinal wave is travelling from left to right. The graph shows the variation of the
displacement of the particles with distance along the wave at one instant in time.A vertically polarised beam of light of intensity I
is incident normally on a polarising filter.
The transmission axis of the filter is at 45 to the vertical. The beam of light transmitted .An electrical cable is made up of one thick strand of copper wire that is surrounded by eight thin
strands of copper wire. All nine strands of wire are connected in parallel with each other.