Geoscientists all study the same thing as volcanology and seismologist

true or false?

false

Explanation:

they study different things, they all have there own specialty

hope this helps :)

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.