Suppose that the strength of the electric field about an isolated point charge has a certain value at a distance of 4 m. how will the electric field strength compare at a distance of 8 m from the point charge? 1. at twice the distance the field strength will be twice the original value. 2. at twice the distance the field strength will be 1 3 of the original value. 3. at twice the distance the field strength will be 1 2 of the original value. 4. at twice the distance the field strength will be 1 4 of the original value. 5. at twice the distance the field strength will be the same.

4. At twice the distance the field strength will be 1/4 of the original value

Explanation:

The magnitude of the electric field produced by an isolated poitn charge is

where

k is the Coulomb's constant

q is the charge

r is the distance from the charge

In this problem, the distance from the charge is doubled from 4 m to 8 m:

Therefore, the new electric field will be

So, the field strength is 1/4 of the original value.

coil wire, increase current, put iron inside the coil

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force