Electricity Unit Test
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An electric current is a flow of electric charge. In electric circuits moving electrons in a wire often carries this charge. Electrical hazards can cause burns, shocks, and electrocution (death). Test your knowledge on electricity, its production and safety techniques through the test below. All the best as you explore!
- 1.Receiving an electric shock from a doorknob is an example of ____________.
- A.
Static electricity
- B.
Current electricity
- C.
Spontaneous electricity
- 2.What kind of charge does an electron have?
- A.
Negative
- B.
Positive
- C.
Neutral
- 3.What is static electricity caused by?
- A.
An imbalance of positive and negative charges
- B.
A balance of positive and negative charges
- C.
A balance of power
- 4.Which of these materials is an insulator?
- A.
Rubber
- B.
Copper
- C.
Aluminum foil
- 5.Which of these materials is a good conductor?
- A.
Gold
- B.
Plastic
- C.
Wool
- 6.Which of these is NOT required in order to have a complete circuit?
- A.
Light switch
- B.
Source of electricity
- C.
Load or resistor
- D.
Wires or path
- 7.When you attach a battery to an electric light bulb, what process makes the bulb light up?
- A.
Protons flowing from the battery into the bulb
- B.
Chemicals moving from the battery through the wire
- C.
Electrons flowing through the circuit
- 8.What should you never bring near an electric appliance?
- A.
Water
- B.
Plastic
- C.
Wind
- 9.What is a steady flow of electricity called?
- A.
A current
- B.
A charge
- C.
A terminal
- 10.A current needs a path to flow along, also known as a
- A.
Circuit
- B.
Resistor
- C.
Power source
- 11.What do we call the materials which electricity can flow through easily?
- A.
Conductors
- B.
Resistors
- C.
Insulators
- 12.Why do we coat wires with plastic or rubber?
- A.
Because those materials are good insulators
- B.
Because they are flexible
- C.
Because those materials look nicer than copper wire
- 13.What device opens and closes an electric circuit?
- A.
A switch
- B.
A power source
- C.
A load
- 14.If you remove a light bulb from a series circuit, what happens?
- A.
The other bulbs go out.
- B.
The other bulbs stay lit.
- C.
The electrons come out of the empty socket.
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