WorksheetsElectricity Topic 1-3 Review
Total questions: 22
Worksheet time: 10mins
Name
Class
Date
1.
When a charged acetate strip and a similarly charged vinyl strip are brought together they will
a)
attract
b)
repel
c)
not affect each other
d)
both become negatively charged
2.
What charge will a material take on if it loses electrons?
a)
positive
b)
negative
c)
no charge
d)
neutral
3.
Materials that allow charges to flow through them are called
a)
unbalanced
b)
conductors
c)
insulators
d)
balanced
4.
If a material is a good conductor, it must
a)
hold electrons tightly
b)
have no electrons
c)
hold its electrons loosely
d)
have neutral electrons
5.
What instrument is used to measure very weak electrical currents?
a)
ammeter
b)
galvanometer
c)
ohmeter
d)
voltmeter
6.
When a circuit is set up, the main purpose of the battery is to provide
a)
heat
b)
current
c)
resistance
d)
insulation
7.
When you measure current, you are measuring the number of _______ that pass a point in one second.
a)
protons
b)
neutrons
c)
atoms
d)
electrons
8.
This circuit component converts electricity into other forms of energy.
a)
load
b)
conductor
c)
switch
d)
control
9.
The voltage of most household appliances is
a)
240V
b)
120V
c)
9V
d)
6V
10.
What equation will give the resistance of a circuit?
a)
R=V/I
b)
R=I/V
c)
R=IV
d)
R=aD
11.
What will happen to the brightness of a bulb in a series circuit if a resistor is added?
a)
It will get brighter
b)
It will go out
c)
It will get dimmer
d)
It will remain unchanged
12.
A battery supplies 9V to a circuit & a lamp provides 6Ω of resistance, what is the current?
a)
1.5 kwh
b)
1.5 J
c)
1.5 W
d)
1.5 A
13.
A dimmer switch for a light must contain this to work properly
a)
parallel circuit
b)
series circuit
c)
resistor
d)
variable resistor
14.
The ability of a wire to carry more current and have a reduced resistance is usually defined by
a)
ohm number
b)
gauge number
c)
resistance number
d)
current number
15.
What is the difference between static and current electricity?
a)
static electricity can hurt you, current does not
b)
current electricity is more dangerous than static electricity
c)
in static electricity electrons flow and current electricity they do not
d)
in static electricity electrons do not flow, in current electricity they do
16.
Which is the best circuit design for wiring a house?
a)
series
b)
parallel
17.
The current of a circuit is most similar to
a)
a stalled vehicle in one lane of a three lane highway
b)
the number of students that pass my classroom door in one second
c)
a traffic light
d)
the "pile up" of students in the foyer right before the lunch bell
18.
The voltage of a circuit is most similar to
a)
a red light at an intersection
b)
the amount of water flowing in a river
c)
the "pile up" of students in the foyer right before the bell to go to class
d)
the number of students that pass my classroom door in one second
19.
The resistance of a circuit is most similar to
a)
laptop carts in the hallway
b)
teachers prompting students to get to class
c)
number driving cars on the highway
d)
number of students passing my classroom door each second
20.
What is the resistance of a light bulb if a 12 V battery sends 2.4A of current through it?
a)
0.2 Ω
b)
28.8 Ω
c)
0.5 Ω
d)
5 Ω
21.
A toaster with a resistance of 145Ω is connected to a 120V source. What current will flow through the toaster?
a)
0.828 A
b)
0.827 A
c)
17 400 A
d)
1.21 A
22.
What is the potential difference across a 1500Ω resistor carrying a current of 0.075A?
a)
1125 V
b)
20 000 V
c)
112.5 V
d)
0.00005 V
100 %
