When the magnet is placed on the glass, it is attracted to the iron filings. The pattern of the iron filings shows that the lines of force that make up the magnetic field of the magnet. Also, The lines of force of north and south poles attract each other whereas those of two north poles fend off each other.
34. The element would have 34 protons. Also 34 electrons.
I., II., and IV. are examples of acceleration. III. isn't.
Yes. B'coz its magnification is always negative.
