For a point charge, the electric field varies with distance r as?

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Q: For a point charge, the electric field varies with distance r as?

Solution: The electric field due to a point charge varies as E = kQ/r², where k is a constant.

Steps: 6

Step 1: Understand what a point charge is. A point charge is a charged particle that is small enough to be considered as a single point in space.
Step 2: Know that the electric field (E) is a measure of the force that a charge would experience in the presence of another charge.
Step 3: Recognize that the electric field created by a point charge depends on two things: the amount of charge (Q) and the distance (r) from the charge.
Step 4: Learn the formula for the electric field due to a point charge, which is E = kQ/r².
Step 5: Identify that 'k' is a constant that depends on the units used and the medium in which the charge is located.
Step 6: Understand that as you move further away from the point charge (increasing r), the electric field strength (E) decreases because it is inversely proportional to the square of the distance (r²).