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| When 2 charges are positioned close to each other they possess |
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Definition
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Term
| unit for electric potential |
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Definition
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Term
| other names for electric potential |
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Definition
electric pressure
voltage
potential difference |
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Term
| 3 Componets of a simple circuit |
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Definition
1. current (amps)
2. voltage (volts)
3. Resistance (ohms) |
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Term
| the "force" of electron flow |
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Definition
| voltage/electric potential |
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Term
| Voltage always flows from: |
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Definition
| high negative potantial to low negative potential |
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Definition
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Definition
| the pathway over which electrons flow |
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Definition
| allows electrons to flow freely |
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Definition
| a conductor with very little resistance to electrons |
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Definition
| does not allow electrons to flow; used as an insultor |
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Definition
| sometimes a conductor and sometimes not |
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Definition
| an electric circuit designed to send electrons through various resistance devices by giving each component its own branch |
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Definition
| an electric cirsuit designed to send electrons through various resistance devices by linking them to one another |
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Term
| where do negative charges reside? |
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Definition
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Term
| Factors influencing resistance |
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Definition
1. Material - type of conductor; good conductor=less resistance
2. Length of conductor - increased legnth=increased resistance
3. Diameter of conductor - decreased diameter=increased resistance
4. Temperature - increased temp=increased resistance |
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Definition
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Definition
The voltage across the total circuit or any portion of the circuit is equal to the current times the resistance.
V=IR |
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Term
| In a series circuit, what is contant? |
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Definition
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Term
| In a series circuit, what will vary with resistance? |
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Definition
| Voltage will vary with resistance |
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Term
| In a parallel circuit, what is constant? |
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Definition
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Term
| In a parallel circuit, what will vary with resistance? |
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Definition
| Current will vary with resistance |
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Term
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Definition
| stores electrical enegery |
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Term
| Who proved a magnetic field can produced electricity? |
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Definition
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Term
| Who laid the groundwork for a generator? |
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Definition
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Term
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Definition
| the amount of charge stored; Farad is unit of measurement |
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Term
| The amount of charge stored |
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Definition
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Term
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Definition
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Term
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Definition
| a coil wire that acts as a conductor |
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Term
| What kind of "ring" does a DC generator have? |
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Definition
| commutator ring/split ring |
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Term
| The current induced on the armature of a generator will always be _____. |
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Definition
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Term
| 1 AC cycle takes place in _______ sec. |
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Definition
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Term
| 1/2 AC cycle, or one pulse, takes place in _______ sec. |
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Definition
| 1/120 sec = 120pps (60+/60-) |
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Term
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Definition
| the amount of work current can do |
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Term
| The amount of work current can do |
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Definition
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Term
| Unit of measurement for Power |
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Definition
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Definition
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Term
| All electrical devices produce _____. |
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Definition
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Definition
Power Loss = I^2 R
The amount of heat produced depends on the current the device draws and the resistance of the conductor |
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Term
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Definition
| Electromagnetic device that allows us to transform the intensity of alternating voltage and current. |
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Term
| A device in which 2 coils are placed near one another without electrical connection. The number of coils differes, causing a change in current in the secondary coil, this serves to either increase or decrease the voltage. |
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Definition
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Term
| Transformer perform at ____% efficiency. |
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Definition
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Definition
| A transformer that has more turns on the secondary side than the primary side. |
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Definition
| variable transformer, can step-up or step-down voltage |
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Definition
| a branch of physics that deals with the relationship between electricity and magnetism |
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Term
| The branch of physics that deals with the relationship between electricity and magnetism |
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Definition
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Term
| Experiment Oersted used to link electricty and magnets. |
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Definition
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Term
| Who demonstrated how flux lines arrange themselves around the conductor using DC current? |
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Definition
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Term
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Definition
| The total resistance in an AC circuit (Z) |
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Term
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Definition
| The ability of an alternating current to witch directions, causing the opposing potential difference to induce against the incoming supply of electrons. |
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Term
| 3 ways electromagnetic induction can happen: |
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Definition
1. The magnetic field moves - the magnet moves while the conductor is stationary
2. The conductor moves - the conductor moves while the magnet is stationary
3. magnetic flux changes direction - magnet and conductor remain stationary |
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Term
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Definition
The magnitude of induced current depends on 4 factors:
1. the strength of the magnetic field
2. teh velocity of the magnetic field as it moves past the conductor
3. the angle of the conductor to the magnetic field
4. The amount of turns in the conductor |
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Term
| What is the direction of the induced current? |
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Definition
| Opposite to the direction of the action that has induced it. |
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Term
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Definition
1. Mutual Induction - the result of 2 coils being placed in close proximity with a varying current supplied to the first coil, which then induces a similar flow in the second coil.
2. Self Induction - The ability of an alternating current to switch directions, causing an opposing potential difference to induce against the incoming supply of electronsl allows direct current to flow while at the same time hindering alternating current. |
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Term
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Definition
| the study of moving negative charges |
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Term
| Material which allow electrons to move through them easily are termed: |
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Definition
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Term
| Ohm's law is represented mathematically by: |
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Definition
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Term
| In a prallel circuit, as the resistance increases the: |
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Definition
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Term
| The ammeter is a device which measures current and is connected in _____ in the circuite. |
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Definition
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Term
| The unit for electrical pressure is: |
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Definition
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Term
| As the length of a conductor increases, the resistance: |
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Definition
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Term
| The total resistance in a parallel circuit is _____ the resistance through each branch of the circuit. |
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Definition
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Term
| The fundamental unt=it of electric charge is the: |
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Definition
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Term
| ______ denonstrated the magnetic flux lines through experimental investigation. |
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Definition
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Term
| Defined as the ease at which a material can be magnetized. |
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Definition
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Term
| The unit for power is the: |
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Definition
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