15. What happens to the intensity of brightness of the bulbs connected in a ser
added?
a. decreases b. increases
c. remains the same d. cannot be predicted
16. Jean is using a string of lights connected in a series circuit. What will happen if one bulb burned out?
a. The whole string of light goes out, the circuit is broken
b. The whole string of light goes on, the circuit continues.
c. The whole string of light goes out, the circuit continues.
d. The whole string of light goes on, the circuit is broken.
17. To decrease the strength of an electro magnet
a add iron center to the coil
c.decrease the number of loops of wire in the coil
b. increase the number of loops of wire in the coil d. All of the above.
18. What kind of magnet is an electromagnet?
a. permanent b. semi-permanent c. temporary d. no correct answer
19. Which of these will an electromagnet pick up?
eraser
c. pencil d. thumb tack
a.
b. paper
__20. In which kind of electric circuit will an electromagnet attract?
a. Open circuit
b. closed circuit
c. short circuit
d. both a and b