Electricity & Unit 1 Review
Let's review Electricity! And Unit 1!
- 1.Electricity is the flow of these:
- A.
Neutrons
- B.
Protons
- C.
Electrons
- D.
All of the above because they all make up the atoms
- 2.In the static electricity lab, which of the following was true?
- A.
The friction between your hair and the balloon caused your hair to lose electrons and the negatively charged balloon was then attracted to your positively charged hair.
- B.
The friction between your hair and the balloon caused your hair to gain electrons and the negatively charged balloon was then attracted to your positively charged hair.
- C.
The friction between your hair and the balloon caused your hair to lose electrons and the positively charged balloon was then attracted to your positively charged hair.
- D.
The friction between your hair and the balloon caused your hair to lose electrons and the negatively charged balloon was then attracted to your negatively charged hair.
- 3.The density of an object that takes up 10 mL of space and has a mass of 5 grams would be:
- A.
2 g/mL
- B.
0.5 g/mL
- C.
0.5 g*mL
- D.
2 g*mL
- 4.True/False: A Leyden jar could kill you.
- A.
True
- B.
False
- 5.The roses smelled lovely is an example of:
- A.
Qualitative data
- B.
Quantitative data
- 6.Lightning forms when:
- A.
The bottoms of clouds become positively charged and attract electrons from the surface of the earth.
- B.
Storms cause electrons to be ionized from air molecules and when they all happen in a straight line . . . uh oh!
- C.
Zeus causes it to happen.
- D.
There is a potential difference between the top and bottom of a cloud which causes streamers to form near the earth and lightning happens when the electrons are able to flow from the cloud to the earth.
- 7.The resistance flowing through a 120 Volt circuit with 10 Amps of current would be:
- A.
1200 Ohms
- B.
12 Ohms
- C.
1200 Watts
- D.
12 Watts
- 8.Electrical power is calculated by multiplying the:
- A.
Current X Resistance
- B.
Current X Voltage
- C.
Voltage X Resistance
- D.
Coulombs X Voltage
- 9.The reason you could use a pickle light for a light bulb is because:
- A.
The arcing between the nails makes protons glow orange when electricity runs through the pickle.
- B.
You can use any sort of fruit or vegetable as a light bulb, they will all glow orange.
- C.
Electrons in the sodium in the pickle get excited and jump to higher energy levels releasing photons of light when they fall back down.
- 10.The most common type of electricity in the US home is:
- A.
AC--120 Volts
- B.
DC--120 Volts
- C.
AC--240 Volts
- D.
DC--240 Volts
- 11.A source of alternating current would be:
- A.
A wet cell
- B.
A dry cell
- C.
A wall socket
- D.
A flashlight
- 12.What is the formula for density?:
- A.
Mass x volume
- B.
Mass/volume
- C.
Grams/centimeters
- D.
Volume/mass
- 13.How much current flows through a flashlight if the battery has a resistance of 9 Ohms and runs off an 18 volt battery?
- A.
0.5 Amps
- B.
0.5 Ohms
- C.
2 Ohms
- D.
2 Amps
- 14.True/False: Theories explain WHAT happens, laws describe why things happen.
- A.
True
- B.
False
- 15.A circuit is:
- A.
An open path through which protons flow.
- B.
An open path through which electrons flow.
- C.
A closed path through which protons flow.
- D.
A closed path through which electrons flow.
- 16.A series circuit has:
- A.
One possible path for electricity to flow.
- B.
Two possible paths for electricity to flow.
- C.
Three or more possible paths for electricity to flow.
- 17.A lightbulb lights because:
- A.
Electrons flow easily through the filament made of Tungsten.
- B.
Electrons have a hard time flowing through the filament.
- C.
Electrons rush through the filament and release photons of white light.
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