Unit Exam Review
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| If an object is repelled by a negativly charged object, the object has/is | Negative Charge
🗑
|
||||
| Describe an atom | Electrons orbit around the protons and neutrons
🗑
|
||||
| As Emile touches a Van de Graaf, his hair began to stand on end and spread out. This was most likely due to | His hair strands being repelled by each other
🗑
|
||||
| Emile reaches out to touch Leslie and both students feel aa sudden painful shock. This is most likly due to | A static discharge from Emile to Leslie
🗑
|
||||
| The amount of current flowing through a circuit is measured in | Ahmps
🗑
|
||||
| What type of meter measures only potential difference? | Voltometer
🗑
|
||||
| If each cell is 1.5 volts, than four cells equals | 6 volts
🗑
|
||||
| When a fuse burns out in your home it means | To much current is flowing through the circuit
🗑
|
||||
| Christmas trees are wired so that if one bulb "dies", the other bulbs will remain lit. These lightbulbs are connected in _______ | Parallel
🗑
|
||||
| What makes up an electromagnet? | Iron core, such as an iron nail, coil of wire, and battery
🗑
|
||||
| What makes up an electrochemical cell? | Electrodes; one anode, one cathode; electrolyte
🗑
|
||||
| Electrode Definition | Metals
-Two different
-Anode; negative
-Cathode-positive
🗑
|
||||
| Electrolyte Definition | Liquid or paste
-Salt or acid
🗑
|
||||
| What is the unput and output energy conversions for a battery? | Input-Chemical energy
Output- Electrical energy
🗑
|
||||
| What is the unput and output energy conversions for a Generator? | Input- Mechanical energy
Output- Electrical energy
🗑
|
||||
| What is the unput and output energy conversions for a Motor? | Input- Electrical energy
Output- Mechanical energy
🗑
|
||||
| What is the unput and output energy conversions for a Thermocouple? | Input- Thermal energy
Output- Electrical energy
🗑
|
||||
| What is the unput and output energy conversions for a Lightbulb? | Input- Electrical energy
Output- Light energy
🗑
|
||||
| Insulators- definition and examples | Does not allow electrons to flow on them
ex) Rubber, glass
🗑
|
||||
| Conductors- definition and examples | Allows electrons to flow on them
ex) metal
🗑
|
||||
| Current is... | The amount of electrons flowing
🗑
|
||||
| Voltage is... | The pressure the electrons are under
🗑
|
||||
| Resistance is... | The slowing of electrons in a circuit
🗑
|
||||
| Using Ohms law, calculate how much current is created when 210V creates a current through a 150ohm registor | (R=V/I)
I=1.4A
🗑
|
||||
| What type of filament in a lightbulb would offer the most resistance? | Long, thin wire
🗑
|
||||
| An electric motor has a resistance of 185ohms. It is connected to a power source that has a voltage of 120V. What is the current? | (R=V/I)
I=0.65A
🗑
|
||||
| An electric appliance draws 1200W of power. Electricity costs 9 cents per kWh. How much does it cost to operate the appliance 4 hours a day for 50 days? | $21.60
🗑
|
||||
| A light bulb draws 1.5A of current from a 110V generator. How much energy does the generator produce? | (P=I/V)
165W
🗑
|
||||
| What is a variable resistor? | Can control (vary) the resistance
ex) dimmer switch
🗑
|
||||
| What is a circuit breaker? | Saftey device that will open the circuit (break metal-to-metal contact) and turn off the electricity if there are too many volts or amps flowing into a house
🗑
|
||||
| Name the brightest and dimmest: 1 battery, 4 lights in series; 1 battery, 5 lights in parallel: 1 battery, 3 lights in series | Brightest: 1 battery, 5 lights in parallel
Dimmest: 1 battery, 4 lights in series
🗑
|
||||
| A lightbulb is only 4% efficient in producing light. If 800J of input energy went into producing light, what is the output energy the bulb is capable of? | Efficiency=output/input x 100
Output= Input x Efficiency
32J
🗑
|
||||
| Coal fired energy | Burning fossil fuels for energy
-produces toxic fumes
🗑
|
||||
| Hydroelectric | Using water currents to create electricity
-disturbs natural water
🗑
|
||||
| Nuclear | Splitting or combining atoms releasing bursts of energy
-radioactive
🗑
|
||||
| Solar | Uses suns energy to produce electricity
-cannot collect on cloudy days
🗑
|
||||
| Geothermal | Using heated steam from deep in the earth to produce electricity
🗑
|
||||
| Input= 71J Output= 11J Efficiency=? | (Efficiency= output/input x 100)
Efficiency = 15.5%
🗑
|
||||
| Input= 100J Output= 34J | (Efficiency= output/input x 100)
Efficiency = 34%
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
faith_w.
Popular Science sets