Transcript 1. Give an example of a conductor

1. Give an example of a conductor
Copper
Aluminum
Plasma
Graphite
Found on page 466
2. Give an example of an insulator
•
•
•
•
•
Glass
Dry wood
Cloth
Most plastics
Dry air
– Found on page 465
3. What type of circuit is this?
series
4. What type of circuit is this?
parallel
5. What is this called?
electroscope
6. What is the force between a 3 C
charge and a 2 C charge separated by a
distance of 5 meters?
***Hint: F= K(Q1 x Q2) / r² and
K= 9 x 10⁹ Nm²/c²
•
•
•
•
A. 5.4 x 10⁹
B. 5.4 x 10²
C. 3 x 10³
D. 2.7 x 10¹⁰
– Found on page 472
7. What charge do electrons have?
• Negative!
8. Lightning is______________.
•
•
•
•
A. a very large discharge of static
electricity
B. a buildup of neutrons
C. a low voltage electric current
D. harmless
9. Which of the following is
designed to open an overloaded
circuit and prevent overheating?
•
•
•
•
A. transformer
B. magnet
C. resistor
D. circuit breaker
10. How are the headlights on a car
wired?
• Series
• parallel
11. After charging a balloon, you
decide to stick it to the wall. It will
stay on the wall forever….unless
something knocks it down.
• True
• False
– Found on page 463
12. Similar charges____________.
•
•
•
•
A. attract
B. repel
C. become neutral
C. disappear
The force between charges is stronger
when they are further apart.
• True
• False
14. What is it called when a neutral
object is charged by touching it with a
charged object?
•
•
•
•
A. Charging by induction
B. Charging by conduction
C. Charging by convection
D. Charging by radiation
– Found on page469
15. What is it called when a neutral
object is charged by bringing it close to
a charged object without touching it?
•
•
•
•
A. Charging by induction
B. Charging by conduction
C. Charging by convection
D. Charging by radiation
– Found on page 470
16. When an electroscope is charged,
electrical forces cause the metal
leaves__________.
•
•
•
•
A. to stick together
B. to spread apart
C. to dance around
D. to shock someone
– Found on page 469