Q . How did Benjamin Franklin explain electrical charge? 2. How might you demonstrate the existence of an electrical force? 3. How is it possible that the movement of negative charges like electrons can produce both positively and negatively charged materials? 4. How might you demonstrate the existence of a magnetic force? 5. What is a magnetic monopole? 6. How does an electromagnet work? 7. How does an electromagnet differ from a permanent magnet? 8. How does the movement of an electron in an atomic orbit produce an electric field? 9. Under what circumstances can a magnetic field produce an electrical current? 10. What properties of electrical currents are measured by amperes, volts, and ohms?