- #1
ddnath
- 16
- 0
While studying electricity we always take point charges to calculate force between them according to coulomb's law.And to calculate the electric field around a point charge we take a test charge which is small.
My question is:
1.What is the definition of point charge and test charge?
2.Why test charge is need to be small?
3.Why coulombs law is valid only for point charges?
My question is:
1.What is the definition of point charge and test charge?
2.Why test charge is need to be small?
3.Why coulombs law is valid only for point charges?