How can magnetic and electric fields be demonstrated?

Electric field is always associated with magnetic field.

Explanation:

Relationship between electric and magnetic fields can be explained by the following example. Consider a wire and a magnetic compass placed close together.

When current is flowing through the wire, the needle in the magnetic compass will deflect showing some value indicating the presence of magnetic field during the experiment. This indicates that the electric field is generally accompanied with the magnetic field.

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

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