Download electricity - chapter 1 quiz

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ELECTRICITY - CHAPTER 1 QUIZ KEY
NAME:
PART 1 - FILL IN THE BLANKS (1 MARK EACH)
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1.
2.
3.
4.
An electric - field is an area over which an electric charge exerts a force.
A force of attraction exists between oppositely charged particles.
A force of repulsion exists between similarly charged particles.
In conduction, there is direct contact of objects and electrons flow through one
object to another.
5. Materials that do not allow electric charges to flow freely are called insulators.
6. Rubbing two objects together to charge an object is called friction.
7. Static electricity is the buildup of electric charges in an object.
8. The loss of static electricity is called electric - discharge.
9. In a lightning storm, the bottom of the cloud is negatively charged and the top is
positively charged.
10. Lightning - rods provide a safe path for lightning directly into the ground.
11. An electroscope has uncharged metal leaves hanging straight down.
12. A thermocouple produces electrical energy from heat energy.
13. A photocell produces electrical energy from light energy.
14. In an electrochemical cell, the difference in charges between the positive and
negative terminals is called the potential – difference.
15. A circuit is a complete path for electrons to travel.
16. Potential difference can often be described as voltage.
17. Opposition to the flow of electric charge is called resistance.
18. Current that always flows in the same direction is called direct current.
19. Current that reverses direction regularly is called alternating current.
20. Ohm’s - law identifies a relationship among current, voltage, and resistance.
WORD BANK (words may be used more then once or not at all)
Ohm’s law
Circuit breaker
Parallel
Attraction
Induction
Lightning rods
Potential difference
power
fuses
series
repulsion
insulators
positively
indirect
voltage
circuit
alternating
electric field
static
negatively
current
open
direct
friction
electric discharge
photocell
watts
closed
resistance
conduction
electroscope
thermocouple
PART 2 - CALCULATIONS (1 MARK EACH)
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21.
22.
23.
24.
25.
I (current)
0.16
15
5.5
0.24
5
V (volts)
12
240
110
6
110
R (resistance)
75
16
20
25
22
26.
27.
28.
29.
30.
P (power)
900
15
5.5
150
5
V (voltage)
12
240
0.275
6
110
I (current)
75
0.0625
20
25
0.045
PART 3 – DIAGRAM AND LABEL (3 MARKS EACH)
31. Parallel circuit –
32. Closed circuit –
33. Open circuit –
34. Series circuit –
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