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Current & Static Electricity_Magnets & Electromagnets

Total questions: 33

Worksheet time: 55mins

Name
Class
Date
1.
If an object has the same number of positive and negative charges, its electrical charge is...
a)
positive
b)
negative
c)
neutral or no charge
d)
opposite
2.
What charge does a proton have?
a)
negative (-)
b)
positive (+)
c)
neutral or no charge (0)
3.
What method of static charging is shown in this picture
a)
Polarization
b)
Friction
c)
Induction
d)
Conduction
4.
What types of charges attract?
a)
Positive and Positive
b)
Positive and Neutral
c)
Negative and Neutral
d)
Positive and Negative
5.
What happens when you touch a metal doorknob after rubbing your shoes on the carpet?
a)
The doorknob sends a burst of electric current into your body
b)
Millions of electrons go from your finger into the doorknob
c)
The doorknob sends millions of electrons into your finger
d)
our finger becomes negatively charged
6.
Which of the following is caused by static electricity?
a)
a stove getting hot when it is turned on
b)
a magnet being attracted to a refrigerator
c)
a lightning strike during a storm
d)
a light bulb coming on when a switch is turned on
7.
Which of the following an insulator?
a)
copper
b)
wood
c)
silver
d)
salt water
8.
Lightning is _____.
a)
a buildup of neutrons
b)
harmless
c)
a high-voltage electric current
d)
a large discharge of static electricity
9.
The girl's hair and the comb are attracting  one another.  The hair and the comb have
a)
opposite charges
b)
like charges
10.

Which of these materials is a good conductor of electricity?

a)

Rubber

b)

Metal

c)

Newspaper

d)

Glass

11.

The student conducted an experiment with circuits. Why was the bulb bright when he closed the switch?

a)

The switch produced an electric current

b)

Closing the switch broke the circuit

c)

Closing the switch completed the circuit

d)

The switch did not make a difference

12.

Which of the following items would conduct electricity?

a)

Gold

b)

Nail

c)

Wooden baseball bat

d)

Rubber flip flops

13.
This circuit has more than one loop. When one light goes out, the others stay on. 
a)
closed circuit
b)
series circuit
c)
parallel circuit
d)
open circuit
14.
What kind of circuit is this?
a)
series
b)
parallel
15.
What type of circuit is show in the image?
a)
Series Circuit
b)
Parallel Circuit
16.
When all parts of the circuit are connected it is a ______ circuit. 
a)
open
b)
closed
17.

Why is electrical wiring usually made from copper?

a)

Because copper is shiny

b)

Because copper conducts electricity

c)

Because copper is not magnetic

d)

Because copper insulate electricity

18.

Why is 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

19.
The on switch shows
a)
An open circuit where electricity can flow
b)
A closed circuit that is also called complete
c)
not related to circuits
d)
An incomplete circuit that does not allow electricity to flow
20.
Which parts are needed to complete a simple circuit lighting a lightbulb?
a)
wire, battery, lightbulb
b)
wire, buzzer, lightbulb
c)
wire, battery, buzzer
d)
wire, switch lightbulb
21.
An outlet in a wall and a battery are examples of __________.
a)
Power source 
b)
Load
c)
Energy pathway
d)
ALL of them 
22.

If the lights are off, the circuit is-

a)

open

b)

closed

23.

What could be the RESISTANCE in an electrical circuit?

a)

Bulbs or appliances hooked up to the circuit

b)

Batteries in the circuit

c)

Wires in the circuit

d)

Sockets in the circuit

24.

When a bulb is removed from a parallel circuit, what happens?

a)

All of the other bulbs stay lit

b)

All of the other bulbs go out

25.

Most wiring in your home is in _____

a)

Open circuits

b)

Parallel circuits

c)

Series circuits

26.
What is an electromagnet?
a)
a temporary magnet made from current carrying wire around a magnetic metal core.
b)
a permanent magnet with a north and south pole
27.
How are electromagnets different from magnets?
a)
magnets can be turned on/off
b)
you can turn an electromagnet on/off
c)
magnets are more powerful
d)
magnets have a North and South pole
28.
While electric current is flowing through a wire, what surrounds the wire?
a)
a magnetic field
b)
a glowing light
c)
neutrons
d)
protons
29.

What component provides the pathway to carry electricity from component to component?

a)

battery

b)

wire

c)

switch

d)

iron nail

30.

What are the components of the electromagnet?

a)

copper wire, iron nail, and a wooden stick

b)

copper wire, iron nail

c)

copper wire, iron nail, and a battery

d)

Copper wire, paper and a battery

31.

Why doe the compass needle move when the electricity flows through the coiled wire?

a)

Because a magnetic field is not produced, which do not attract to the needle.

b)

Because a magnetic field is produced, which attracts the compass needle.

c)

Because the battery produced magnetic field.

32.

What would happen if you took one end of the wire off the battery?

a)

The nail will be a magnet.

b)

The nail would no longer be a magnet

c)

Nothing will happened.

d)

The nail will heats up.

33.
What effect will the south pole of one magnet have on the south pole of another magnet?
a)
Repulsive
b)
Attractive
c)
Combative
d)
No effect

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