Two small identical spheres, A and B, are suspended on long silk threads. The spheres carry charges of +3 × 10^-6 C and -2 × 10^-6 C respectively.
4.1 Which sphere has an excess of electrons?
4.2 The two spheres are allowed to touch. Will the electrons be transferred from A to B or B to A?
4.3 The spheres are now separated.
4.3.1 Calculate the ne charge on sphere B.
4.3.2 Calculate the number of electrons transferred during contact.
