Force between two identical short bar magnets whose centres are part is 4.8 n when their axes are in same line. if this separation is increased to 2r metre the force between them is reduced to

Work is reduced while time is decreased

The object's initial distance above the groundthe object's initial velocity

In atoms, the electron carries a negative elementary or unit charge; the proton carries a positive charge. the two types of charge are equal and opposite. in an atom of matter, an electrical charge occurs whenever the number of protons in the nucleus differs from the number of electrons surrounding that nucleus.