a point charge is used to determine the electric field around a charged particle. why is it necessary that…

a point charge is used to determine the electric field around a charged particle. why is it necessary that the point charge does not affect the position of the charge being tested?\nthe amount of charge will increase if the charged particle moves closer to the point charge, so any change in position changes the field.\nthe amount of charge will decrease if the charged particle moves closer to the point charge, so any change in position changes the field.\nelectric fields are inversely proportional to the square of the distance, so any change in position changes the field.\nelectric fields are directly proportional to distance, so any change in position changes the field.

a point charge is used to determine the electric field around a charged particle. why is it necessary that the point charge does not affect the position of the charge being tested?\nthe amount of charge will increase if the charged particle moves closer to the point charge, so any change in position changes the field.\nthe amount of charge will decrease if the charged particle moves closer to the point charge, so any change in position changes the field.\nelectric fields are inversely proportional to the square of the distance, so any change in position changes the field.\nelectric fields are directly proportional to distance, so any change in position changes the field.

Answer

Brief Explanations:

The electric - field formula is $E = k\frac{Q}{r^{2}}$, where $E$ is the electric field, $Q$ is the source charge, and $r$ is the distance from the source charge. Electric fields are inversely proportional to the square of the distance. If the position of the charge being tested changes (i.e., $r$ changes), the electric - field value changes. To accurately measure the electric field of a charged particle, we don't want the test charge to affect the position of the charged particle and thus change the field we are trying to measure.

Answer:

C. Electric fields are inversely proportional to the square of the distance, so any change in position changes the field.