A review stack for electricity and magnetism.
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| 3 ways to increase the strength of an electromagnet | 1. Add more coils; 2. iron core; 3. increase voltage
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| According to Ohm's Law, you would... | divide voltage by current
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| In a step-up transformer, are there more coils in the primary or secondary coil? | secondary
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| What do an ammeter and galvanometer measure? | current
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| True or False--Transformers can only work with alternating current. | True
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| Which of the following is a good insulator--a penny, a plastic rod, steel wool or copper? | plastic rod
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| True or False--There is a third prong on plugs to protect your appliance from a short circuit. | True
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| True or False--Batteries are made up of electrochemical cells. | True
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| What would happen if you put a compass near the north end of a magnet? | The needle points to the magnetic north
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| What is made up of one or more cells? | a battery
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| What ia another name for potential difference? | voltage
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| What is resistance measured in? | ohms
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| True or False--Circuit breakers, fuses and ammeters are always wired in series? | True
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| What happens when more bulbs are added to a series circuit? | the bulbs get dimmer
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| What are aligned in a magnet? | the domains
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| True or False--One way to make a magnet is to stroke a ferromagnetic material with a magnet in both directions. | False
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| Three ways to strengthen an electromagnet are to increase the amout of ferromagnetic material, use another cell and __________ | add more coils
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| What instrument should you use to measure a tiny amout of current? | galvanometer
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| Electrons flow from the ____________ to ______________. | negative to positive
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| What is current that travels back and forth called? | alternating current
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| What does a switch do to a circuit? | controls the flow
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| What is true about an ammeter reading in the beginning, middle and end of a series circuit? | They are all the same
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| What does it tell you about the type of circuit you have, when on a certain strand of light bulbs, when one goes out, they all go out? | It's a series circuit
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| What is a step-up transformer? | one that increases voltage and decreases current
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| What is a step down transformer? | one that decreases voltage and increases current
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| Which kind of current will work in a transformer--alternating or direct? | alternating
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| Atoms are normally neutral and have an equal number of protons and ____________. | electrons
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| True or False--Conduction happens by direct contact. | True
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| What kind of charge does an object tha is charged by conduction have? | the same as the object which charged it
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| What is it called when an object is charged by the transfer of electrons from another object by rubbing? | friction
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| What is a complete path through which electrons can flow? | a closed circuit
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| Which of the following explains why a charged balloon is attracted to a wall?--conduction, induction or friction | induction
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| Why does your hair stand on end when you touch a Van de Graaf generator? | like charges repel
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| True or False--Glass and rubber are good conductors. | False
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| What is the rate at which electrons flow through a circuit called? | current or amperage
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| True or False--In a series circuit, the amperage (current) is the same in all parts of the circuit. | True
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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.
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Created by:
smhamilton
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