An insulating sphere of radius 13 cm has a uniform charge density throughout its volume. 13 cm 21.6 cm 7.5 cm p If the magnitude of the electric field at a distance of 7.5 cm from the center is 78400 N/C , what is the magnitude of the electric field at 21.6 cm from the center? Answer in units of N/C

The value is

Explanation:

From the question we are told that

The radius is

The electric field is at a distance

Generally the electric field at a distance is mathematically represented as

Note: the reason we are using this

formula is because

Here k is the coulomb constant with value

=>

Generally the electric field at a distance is mathematically represented as

Note: the reason we are using this

formula is because

Now dividing

=>

=>

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.