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bảng tínhElectricity Test Review
Total câu hỏi: 49
Worksheet time: 1hrs 2mins
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1.
What is an electrical charge that has built up in one place?
a)
voltage
b)
static electricity
c)
induction
d)
current
2.
What are three ways to give an object a static charge?
a)
repulsion, friction, induction
b)
generators, circuits, resistors
c)
induction, conduction, friction
d)
conduction, grounding, discharge
3.
What is the instrument that detects static charges?
a)
multimeter
b)
circuit breaker
c)
electroscope
d)
voltmeter
4.
Why does static cause your hair to stand on end?
a)
you are grounded
b)
electrons take the path of least resistance
c)
electrons in hair are attracted to protons in the air
d)
like charges repel
5.
How is a static discharge different from electric current?
a)
it is more dangerous
b)
it is not continuous
c)
there is no difference
d)
it has a higher voltage
6.
What is the abbreviation for current?
a)
I
b)
A
c)
Ω
d)
C
7.
What is the symbol for potential difference?
a)
Ω
b)
A
c)
V
d)
P
8.
What is the abbreviation for the unit of resistance?
a)
R
b)
I
c)
Ω
d)
A
9.
In the picture, what does symbol B portray?
a)
resistor
b)
wire
c)
switch
d)
battery
10.
In the picture, what does symbol A portray?
a)
resistor
b)
wire
c)
switch
d)
battery
11.
In the picture, what does symbol E portray?
a)
resistor
b)
one battery
c)
switch
d)
two batteries
12.
What is moving in an electric circuit?
a)
electrons
b)
protons
c)
atoms
d)
voltage
13.
What is the name for a circuit with two or more paths to follow?
a)
series
b)
parallel
c)
continuous
d)
resistance
14.
What is the name for a material that electrons do not easily flow through?
a)
conductor
b)
fuse
c)
resistor
d)
breaker
15.
What is the best way to tell if a string of lights is in parallel or series?
a)
count the number of wires
b)
remove a light bulb
c)
see if the bulbs have different brightness
d)
watch which bulbs flicker and which do not
16.
What prevents too much current from going through a wire in a home?
a)
lots of resistors
b)
GFCI (ground fault circuit interrupter)
c)
parallel wiring
d)
circuit breaker
17.
Which of the following is NOT named after a person?
a)
Volts
b)
Amperes
c)
Ohms
d)
Watts
18.
What are the units for potential difference?
a)
Volts
b)
Amperes
c)
Ohms
d)
Watts
19.
What are the units for current?
a)
Volts
b)
Amperes
c)
Ohms
d)
Watts
20.
What are the units for resistance?
a)
Volts
b)
Amperes
c)
Ohms
d)
Watts
21.
What is the potential difference in a circuit with 8 Ω of resistance and 12 A of current?
a)
96 V
b)
1.5 V
c)
20 V
d)
4 V
22.
What is the current in a circuit that has 3.0 V and a 5 Ω resistor?
a)
15 A
b)
0.6 A
c)
2 A
d)
8 A
23.
A house running at 120 V has a circuit with a current of 22 Amps. What is the resistance in the circuit?
a)
5.5 Ω
b)
98 Ω
c)
25 Ω
d)
5 Ω
24.
What is the name of the positively charged subatomic particle?
a)
positron
b)
neutron
c)
electron
d)
proton
25.
Lightning is what type of electricity?
a)
static
b)
current
c)
friction
d)
radiant
26.
How do dry cells generate electrical energy?
a)
by completing a circuit
b)
by creating electrons
c)
by being acidic
d)
by a chemical reaction
27.
What causes a balloon to stick to a wall?
a)
induction
b)
conduction
c)
power
d)
resistance
28.
Draw a picture of a balloon stuck to a wall *with charges* and show Ms. Kogut for the correct answer.
a)
puppies
b)
kittens
c)
goldfish
d)
hamsters
29.
Which circuits are only series circuits?
a)
2 only
b)
2 and 3
c)
2 and 4
d)
4 only
30.
Which circuits are only parallel circuits?
a)
2 only
b)
3, 4 and 5
c)
3 only
d)
3 and 5
31.
Which circuits have elements of both series and parallel circuits?
a)
4 and 5
b)
3, 4 and 5
c)
4 only
d)
5 only
32.
Compare the intensity of the light bulbs in circuits 2 and 3. Which circuit will have the brighter bulbs?
a)
Circuit 2 because there are fewer bulbs
b)
Circuit 3 because there are more bulbs
c)
Circuit 2 because there is one path
d)
Circuit 3 because there are three separate paths
33.
If you unplug light bulb A in circuit 3, what happens to light bulb B?
a)
B stays lit because there is some electricity left in the circuit
b)
B goes out because the filament breaks with all the extra current
c)
B stays lit because the circuit is parallel and it has a separate path
d)
B goes out because the circuit is series and removing A breaks the path
34.
If you unplug light bulb A in circuit 2, what happens to light bulb B?
a)
B stays lit because there is some electricity left in the circuit
b)
B goes out because the filament breaks with all the extra current
c)
B stays lit because the circuit is parallel and it has a separate path
d)
B goes out because the circuit is series and removing A breaks the path
35.
If you unplug light bulb A in circuit 4, what happens to the other three bulbs?
a)
B stays lit, but C & D go out because they are in series
b)
B goes out, but C & D stay lit because of the current left in the circuit
c)
All three (B, C, & D) stay lit because B is in parallel and allows electricity to flow through
d)
All three (B, C, & D) go out because the entire circuit is in series and removing A breaks the path
36.
If you unplug light bulb D in circuit 4, what happens to the rest of the bulbs?
a)
C & D go out because they are in series, but A and B are parallel, so they stay lit
b)
All the bulbs go out because D is in series and breaks the path
c)
The rest of the bulbs (A, B, & C) stay on because A and B are in parallel and have a separate path
d)
It is impossible to tell without trying it
37.
On circuit 5, where could you place a switch to control all the lights?
a)
X
b)
Y
c)
A
d)
C
38.
On circuit 5, where could you place a switch to control only bulb A?
a)
X
b)
Y
c)
A
d)
C
39.
What happens in a short circuit?
a)
no resistance
b)
very high current
c)
wires heat up
d)
all of the above
40.
What is the best thing to do if you are caught in a lightning storm with nowhere to go?
a)
lie flat on the ground
b)
seek shelter under a tree
c)
crouch down and make only one point of contact with the earth
d)
lie down in a ditch
41.
If you were caught in a lightning storm and there was a car nearby, why would that be a good place to take cover?
a)
the car's rubber tires insulate you from the ground
b)
the car sheilds you from the rain, and water is a good conductor
c)
the car's metal frame directs the electricity safely around you
d)
the car is low to the ground, so lightning likely will not strike it
42.
A car in a lightning storm acts like which of the following?
a)
Tesla coil
b)
Faraday cage
c)
Edison bulb
d)
Volt meter
43.
T or F: A kilowatt hour (kW⋅hr) is a rate.
a)
True
b)
False
44.
Watt is the unit for ________?
a)
Electrical Energy
b)
Power
c)
Current
d)
Resistance
45.
In August, UPPCO read your meter at 7361 kW⋅hr. In September, the company estimated your usage to be 7645 kW⋅hr. If electricity costs $0.22 per hour, what is your electricity bill for September?
a)
$62.48
b)
$3.08
c)
$28.41
d)
$113.67
46.
In August, UPPCO read your meter at 7361 kW⋅hr. In September, the company estimated your usage to be 7645 kW⋅hr. How many kilowatt hours did you use in September?
a)
7645 kW⋅hr
b)
284 kW⋅hr
c)
7361 kW⋅hr
d)
580 kW⋅hr
47.
What is the difference between electrical energy and power?
a)
Power is a rate and electrical energy is not.
b)
Electrical energy is always higher than power.
c)
Electrical energy is used in homes and power is not.
d)
Electrical energy is measured in kilowatts and power is measured in kilowatt hours.
48.
What is required for generating electricity?
a)
a turbine
b)
a complete circuit
c)
an engine
d)
conduction
49.
What two things can be used to generate electricity through induction?
a)
coil of wire and a magnet
b)
turbine and fossil fuel
c)
battery and a resistor
d)
none of the above
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