Question

To determine the electric field due to a point charge, the test charge should be small. Explain why?

Answer 1

Answer:

To measure the electric field E at a point P due to a collection of charges, we can bring a small positive charge q to the point P and measure the force on this test charge. The test charge must be small, because it interacts with the other charges, and we want this interaction to be small.

Answer 2

Answer:

To measure the electric field E at a point P due to a collection of charges, we can bring a small positive charge q to the point P and measure the force on this test charge. The test charge must be small, because it interacts with the other charges, and we want this interaction to be small.