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Electricity and Circuits

Total questions: 25

Worksheet time: 22mins

Name
Class
Date
1.

What is the interaction of electric charges that causes the flow of electrons from one place to another called?

a)

Static Electricity

b)

Electric Current

c)

Electricity

d)

Insulation

2.

Electricity travels at the speed of ______.

a)

Sound

b)

Light

c)

Water

d)

Wind

3.

Fill in the blank: A substance that allows electric current to pass through is called a ______.

a)

A) Insulator

b)

B) Conductor

c)

C) Resistor

d)

D) Capacitor

4.

Electricity is the interaction of electric charges and the flow of ______ from one place to another.

a)

protons

b)

neutrons

c)

electrons

d)

ions

5.

What is the property of protons and electrons that make up every atom?

a)

Mass

b)

Electric charge

c)

Volume

d)

Density

6.

Fill in the blank: Materials that do not allow electric current to flow through them easily are called ________.

a)

Conductors

b)

Insulators

c)

Semiconductors

d)

Resistors

7.

Which best briefly summarizes the law of electric charges?

a)

Charges always repel.

b)

Charges always attract.

c)

Charges that are opposite in nature attract; charges that are the same in nature repel.

d)

Charges that are opposite in nature repel; charges that are the same in nature attract.

8.

What is the buildup of electrical charges in one place called?

a)

Neutrons

b)

Static Electricity

c)

Insulator

d)

Conductor

9.

What unit is electric current measured in?

a)

Ω (Ohms)

b)

V (Volts)

c)

A (Amps)

d)

W (Watts)

10.

Which of the following would be the best example of a conductor?

a)

a. a tire

b)

b. a plastic spoon

c)

c. a log

d)

d. aluminum foil

11.

All wires used to carry electricity should be covered with _____.

a)

a. a colored material

b)

b. a conducting material

c)

c. an insulating material

d)

d. none of these.

12.

Which form of electric discharge appears in nature?

a)

sunlight

b)

thunder

c)

lightning

d)

northern lights

13.
You know that the object connected to the wires is a conductor because:
a)
The light bulb is glowing bright.
b)
It's a complete circuit.
c)
It's a closed circuit.
d)
The object is shiny.
14.

Why does a negatively-charged balloon stick to a neutral wall?

a)
The balloon sticks due to magnetic attraction.
b)
The wall is made of a special material that attracts balloons.
c)
The balloon releases heat that causes it to adhere to the wall.
d)

A negatively-charged balloon sticks to a neutral wall due to electrostatic induction. Electrons in the wall are pushed away, leaving behind protons, creating an attractive force.

15.
This image represents what type of circuit?
a)
open
b)
closed
c)
series
d)
parallel
16.
What kind of circuit is this?
a)
series
b)
parallel
17.
Why won’t the light bulb in the circuit pictured to the right light up?
a)
The wires from the second light bulb are not connected to the battery
b)
The wires are not connected between the light bulbs 
c)
The wires are not connected to both sides of the first light bulb
d)
The wires are too long to complete the circuit 
18.

Match the following

a)
1.

wire

b)
2.

light bulb

c)
3.

battery

d)
4.

switch

e)
5.

electric circuit

19.
this is the symbol for a _____?
a)
switch
b)
light 
c)
battery
d)
wires
20.
In a parallel circuit if one of the light bulbs burns out the rest _________.
a)
stop the flow of electricity
b)
 can still light up
c)
 will go out
d)
of the light bulbs burn out also
21.
what is this symbol for?
a)
light bulb
b)
switch
c)
battery
d)
resistor
22.
This instrument can be used to see if materials conduct electricity.  Which of these groups contains items that could all conduct electricity to complete the circuit?
a)
rubber ball, plastic comb, nail
b)
paper clip, penny, screw
c)
cork, dollar bill, tweezers
d)
pencil, eraser, spoon
23.

Why electrical wiring usually are covered with a layer of plastic?

a)

To make it look pretty

b)

To help electricity flow along the wire

c)

To make it safe

d)

To add more energy

24.

Why is a battery important in an electrical circuit?

a)

As a source of energy.

b)

As a path for electricity to flow through.

c)

As a connector to connect all parts of a circuit.

25.
Battery cells are connected in series to _______
a)
Increase voltage output
b)
Decrease voltage output
c)
Increase current capacity
d)
Decrease current capacity

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