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WorksheetsElectricity - Ch 15
Total questions: 24
Worksheet time: 12mins
Name
Class
Date
1.
When an atom loses electrons, its charge becomes
a)
neutral
b)
positive
c)
negative
d)
positive or negative
2.
Which of the following is an example of a conductor?
a)
glass
b)
rubber
c)
plastic
d)
salt water
3.
Why is an insulator used in a circuit?
a)
An insulator helps keep the electric charges inside the pathway.
b)
An insulator transforms electrical energy into other forms of energy.
c)
An insulator provides the energy to pump electric charges through the circuit.
d)
An insulator provides the pathway electric current moves through.
4.
Which of the following parts of a circuit acts as a resistor?
a)
battery
b)
light bulb
c)
copper wire
d)
on/off switch
5.
How many resistors does this circuit diagram show?
a)
1
b)
3
c)
5
d)
4
6.
How is a parallel circuit different from a series circuit?
a)
A series circuit has more than one pathway for electrical energy to move through.
b)
A parallel circuit has more than one pathway for electrical energy to move through.
c)
A series circuit provides more electrical energy.
d)
A parallel circuit provides more electrical energy.
7.
How can you make an electromagnet stronger?
a)
add more coils of wire
b)
remove some coils of wire
c)
place a plastic bar inside the coils
d)
attach some of the coils to a plastic bar inside the coils
8.
What is the definition of a superconductor?
a)
It has no resistance to electrical current.
b)
It has a high resistance to electrical current.
c)
It conducts electricity at super high pressures.
d)
It conducts electricity at super high temperatures.
9.
Why does a balloon rubbed on a sweater stick to a wall?
a)
The balloon's charge repels the charge of the wall.
b)
The balloon's charge attracts the charge of the wall.
c)
The balloon's charge is equal to the charge of the wall.
d)
The balloon's charge is greater than the charge of the wall.
10.
Choose the word that belongs in the sentence.
A circuit with more than one resistor on a single wire is a _________ circuit.
A circuit with more than one resistor on a single wire is a _________ circuit.
a)
simple
b)
multiple
c)
complex
d)
series
11.
Which step should you take to avoid an electrical shock?
a)
Pull electric cords from the walls by quickly yanking on them.
b)
Keep cord-operated appliances away from pools and other water.
c)
Wear gloves before moving a downed power line away from public areas.
d)
If a radio falls into a sink filled with water, turn the radio off before pulling the cord out.
12.
A material through which an electric current can move easily is a _______________.
a)
battery
b)
insulator
c)
conductor
d)
switch
13.
Which of these is an example of a good conductor?
a)
rubber
b)
paper
c)
brick
d)
copper
14.
Which of these stops an electrical current?
a)
insulator
b)
conductor
c)
battery
d)
wire
15.
Which of these is a good example of an insulator?
a)
copper
b)
aluminum
c)
rubber
d)
penny
16.
A is ?
a)
battery
b)
switch
c)
resistor
d)
wire
17.
B is ?
a)
battery
b)
switch
c)
resistor
d)
wire
18.
C is ?
a)
battery
b)
switch
c)
resistor
d)
wire
19.
D is ?
a)
battery
b)
wire
c)
resistor
d)
switch
20.
Is this a parallel circuit or a series circuit? (Be prepared to explain how you know.)
a)
parallel
b)
series
21.
Electromagnet and regular magnets are stronger in the middle than at the poles.
a)
True
b)
False
22.
Regular magnets can be turned on and off and made stronger.
a)
True
b)
False
23.
Electromagnets can be turned on and off and made stronger.
a)
True
b)
False
24.
Electromagnets attract magnetic objects.
a)
True
b)
False
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