Bushong Ch 5
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| show | Electrostatics
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| Electrification can be created by? | show 🗑
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| show | Convert electric energy into electromagnetic energy.
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| show | automobile battery from chemical to electric, an electric motor converts electric energy to mechanical energy.
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| show | Electric charge.
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| Electric charges associated with an electron and a proton have the same ???? but opposite ??? | show 🗑
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| An object that has too few or too many electrons is said to be? | show 🗑
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| show | The coulomb (C)
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| show | an electron
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| show | 4
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| What are the electrostatic laws? | show 🗑
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| show | the volt (V)
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| show | Electrodynamics
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| show | A conductor
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| What are some examples of electrical conductors? | show 🗑
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| What is an insulator? | show 🗑
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| show | Glass, clay and other earthlike materials
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| show | They confine electron flow to the conductor.
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| show | A material that under some conditions behaves as an insulator and in other conditions behaves as a conductor.
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| Who first demonstrated semiconduction? When? | show 🗑
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| Examples of semiconductor materials? | show 🗑
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| What did the development of semiconduction lead to? | show 🗑
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| The ability of the property of some materials to exhibit no resistance below a critical temperature is called? | show 🗑
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| show | decreases; reduced
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| show |
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| Name two superconducting materials that allow electrons to flow without resistance. | show 🗑
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| What are the characteristics of superconductor niobium? | show 🗑
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| What are the characteristics of superconductor titanium? | show 🗑
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| What are the characteristics of conductor copper? | show 🗑
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| What are the characteristics of conductor aluminum? | show 🗑
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| show | Can be conductive
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| show | Can be resistive. Basis for computers
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| show | Does not permit electron flow.
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| show | Extremely high resistance. Necessary with high voltage.
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| show | When resistance is controlled and the conductor is made into a closed path.
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| show | True.
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| show | amperes(A)
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| The ampere is proportional to? | show 🗑
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| One ampere is equal to? | show 🗑
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| show | Ohm's Law V=IR
where V is electric potential in voltage, I is electric current in amperes, and R is electric resistance in ohms.
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| show | The voltage across the total circuit or any portion of the circuit is equal to the current times the resistance.
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| Usually electric circuits can be reduced to two basic types, name them. | show 🗑
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| show | All circuit elements are connected in a line along the same conductor. Like the old christmas lights.
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| show | Contains elements that are connected at their ends rather than lying in a line along a conductor.
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| show | DC
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| Electrons that flow alternately in opposite directions constitutes? | show 🗑
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| show | 20 to 150 kW
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| show | magnetic field
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| show | closed loops
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| What is the formula for electric power? | show 🗑
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| Any charged particle in motion creates? | show 🗑
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| show | A sinusoidal electric wavefom
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| show | The rotation of electrons on an axis either clockwise or counter clockwise. The electron spin creates a magnetic field.
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| show | It always has a north and a south pole.
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| show | An accumulation of many atomic magnets with their dipoles aligned.
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| show | perpendicular
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| There are how many principle types of magnets? What are they? | show 🗑
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| The best example of a natural magnet is? | show 🗑
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| Magnetic permeability is the ability of a material to attract???? ???? | show 🗑
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| show | a compass
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| show | an external magnetic field.
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| Electromagnets consist of wire wrapped around an iron core. When an electric current is conducted throught the wire, what is created? | show 🗑
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| show | Nonmagnetic, diamagnetic, paramagnetic, and ferromagnetic.
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| Materials that are unaffected when brought into a magnetic field are called? | show 🗑
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| Materials that are weakly repelled by either magnetic poles are called? | show 🗑
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| show | Ferromagnetic, such as iron, cobalt and nickel.
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| Materials that lie somewhere between ferromagnetic and nonmagnetic is called? | show 🗑
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| The degree to which a material can be magnetized is? | show 🗑
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| show | a solenoid
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| Faradays law states that the magnitude of the induced current depends on four factors which are: | show 🗑
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| show | An induction motor.
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| Another device that uses the interacting magnetic fields produced by changing electric currents is the? | show 🗑
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| show | voltage and current
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| How many types of transformers are there? | show 🗑
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| show | Autotransformers, Shell-type transformers, and closed-core transformers.
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| What is the transformer used for? | show 🗑
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| show | The law states that the change in voltage is directly proportional to the ratio of the number of turns (windings) of the secondary coil to the number of turns in the primary coil.
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| show | Vs/Vp = Ns/Np
Secondary Voltage/Primary Voltage = Number of turns of the secondary coil/number of turns of the primary coil
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| A transformer with a turn ratio greater than 1 is? | show 🗑
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| A transformer with a turn ratio less that 1 is? | show 🗑
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| show | A closed core transformer
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| show | An auto transformer. (used in x-ray imaging systems)
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| show | Shell type transformers
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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:
Baker RAD 2012
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