# Square

### Distance

The answer that you submitted suggests that you have calculated the square root of the model answer. This indicates that you are having difficulty interpreting how Coulomb's law and/or the electric field depend on distance.

Please review Coulomb's law and electric field for charged spheres and try again.

#### Sign

The value that you submitted suggests that you have calculated the square root of the model answer with an incorrect sign from the question statement. This indicates that you are having difficulty interpreting how Coulomb's law and/or the electric field depend on distance. In addition, you may have missed a sign on one of the charges or you are interpreting the electric fields as scalar quantities instead of vector.

Please review Coulomb's law and electric field for charged spheres and try again.

#### Inverted

The value that you submitted suggests that you have calculated the square root of the inverse of the model answer. This indicates that you are having difficulty interpreting how Coulomb's law and/or the electric field depend on distance. Submission of an answer that is related to the inverse of the model answer typically indicates the value of the known charge has been assigned to the unknown charge by mistake.

Please review Coulomb's law and electric field for charged spheres and try again.

##### Inverted and Sign

The value that you submitted suggests that you have calculated the square root of the inverse of the model answer with an incorrect sign from the question statement. This indicates that you are having difficulty interpreting how Coulomb's law and/or the electric field depend on distance. Submission of an answer that is related to the inverse of the model answer typically indicates the value of the known charge has been assigned to the unknown charge by mistake. In addition, you may have missed a sign on one of the charges or you could be interpreting the electric fields as scalar quantities instead of vector.

Please review Coulomb's law and electric field for charged spheres and try again.

If you could not find a section above that helps resolve your error, please visit the feedback discussion page or try the charged spheres demo question again.