Electromagnetic wave have magnetic and electric component but what is the proof for that? How "non electrostatic" electric field can be detected around coil?
Any electric charge would experience a force due to an electric field. Therefore, the electric field in electromagnetic waves produces currents in antennas. It happens all the time in wireless communication.
In the case of an electrostatically charged dielectric such as a plastic foil, the charges would tend to polarize the charges in any uncharged dielectric material that it comes in contact with. Any charge has a static electric field around it. This electric field produces an attractive or repulsive force depending on the sign of the charges involved. So, say the eletrostatically charged dielectric contains positive charges. Then it would attract negative charges and repulse positive charges in the uncharged dielectric. This causes polarization. The negative charges would now attract the positively charged dielectric. One observes this phenomenon as the tendency of electrostatically charged material to cling to things.