In electrostatics, Electric charge is a feature of particles like protons, electrons, etc. that decides the force of interaction among them.
1. Write the name of the law that is used to measure the above force of interaction.
2. Express the above law in vector form.
3. Two charged spheres when placed in air attract with a force F. Keeping the distance between the charges constant, the spheres are immersed in a liquid of relative permittivity K. Then the spheres will.
- attract with a force KF
- repel with a force KF
- attract with a force F/K
- repel with a force F/K
4. Two small aluminum spheres are separated by 80cm. How many electrons are to be transferred from one sphere to the other so that they attract with a force of 104N.