Complete the following statement: when work is done on a positive test charge by an external force to move it from one location to another, electric potential increase or decrease).

increase

Explanation:

Electric potential is defined as the work done in bringing a unit positive charge from infinity to that point against the electrical forces of the field. Taking a test positive charge from one point to another means that work is done against the field hence electric potential increases.

ok

explanation:

radiation

explanation:

heat is transmitted by radiation