Reading Quiz

Question 1:

Answer:

1. Current is the amount of charge that passes through a a particular point in the circuit per unit of time. The unit of current is the ampere (A).
2. Current is a measure of how much charge passes through a particular point in a circuit per unit of time. Current is measured in amps (A) which corresponds to 1 C passing by a set point each second.
3. Current is the amount of charge passing a particular point in the circuit per unit of time. SI Unit is ampere A
4. Current is the amount of charge passing through a particular point in the circuit per unit of time. It is measured in amperes (A).
6. Current is the amount of electric charge flowing past a point or through a surface per unit of time, measured in units of ampheres.
7. Current is the movement of charge over a distance. For example, in our lab last Monday, we thought in terms of the charge moving from one end of the battery, through the wires, to the opposite end of the battery. That was the current we were tracking.
8. Current is the amount of charge that passes through a certain point in a circuit per unit of time. The unit of current is the ampere and measures coulombs/sec.
9. It is a flow of charge that carries energy with it. The units are in amps, or A.
10. Current is the amount of charge passing a particular point in the circuit per unit of time. Current is measured in amperes (A). One A is equivalent to 1 C passing through per second.
11. the amound of charge passing a point in a circuit per unit time. amperes.
12. Current is the amount of charge passing a particular point in a circuit per unit of time. The unit of current is the ampere. An ampere corresponds to 1 coulomb of charge passing a particular point each second.
13. Current is the amount of charge flowing through a given point in a circuit per unit of time; the unit of current is the ampere.
14. Current is the flow of electrical charge, one example of it would be the flow of electrons through a wire in an electrical system. Current is measured in amperes.
15. current is the amount of charge flowing through a spot at a particular time. Measured in Amperes, which are coloumbs per second.
16. A current is the amount of charge passing through a particular point of a cicuit in a given amount of time. The unit is the ampere (A), and corresponds to one coulomb per second.
17. Current is the amount of charge passing through a particular point in the circuit per unit of time. The unit of current is the ampere, or one Coulomb per second.
18. A current is the amount of electric charge flowing past a point or through a surface per unit of time. The unit of current is called an ampere.
19. A current is the amount of charge that passes through a point in a circuit during a set unit of time. The ampere is the SI unit, which is how many columbs pass the given point each second.
20. A current is the amount of charge passing a particular point in the circuit per unit of time. The SI unit of current is the ampere(A).
21. Current is the measure of charge passing through a circuit and is measured in amperes (A). An ampere is one coulomb of charge per second.
22. Current is the amount of electric charge flowing past a point or through a suface per unit of time. The SI units of current is ampere.

Question 2:

Answer:

1. The battery pumps charge from low voltage to high voltage. It uses chemical forces to transfer chrages from its negative end to its positive end. The positive charges build up on the end and increase voltage there, while the negative end decreases voltage there.
2. The battery is the source of power for the circuit, and it uses chemical forces to transfer charges from the negative terminal to positive terminal. Positive charge accumulates on positive terminal which increases the voltage there, and negative charges accumulate on the negative terminal which causes the voltage there to drop. The battery then does work to transfer changes from low to high voltage, so converts chemical potential energy into elecrtostatic potential energy in the separated charges.
3. The battery is a type of pump. It pumps charge from low voltage to high voltage, from one end of the flashlight to the other.
4. The battery pumps charge from low voltage to high voltage, so it does work on it and increases the charge's electrostatic potential energy by pushing it up a voltage gradient
6. The battery provides electric current to light the bulb; it pumping current from low voltage to high voltage areas and gives charges electrostatic potiential energy.
7. The battery provides the charges. The charges are trying to get from the positive end of the battery to the negative end (or vice versa). So, when you attach the two ends of the battery through the wire, the battery provides the current through the wire to make the light bulb light.
8. The battery acts like a pump, moving charge against its natural direction. It moves charge from an area of low voltage to high voltage. The batteries keep the charge flowing in a current, providing a constant source of power.
9. The battery pumps charge from low voltage to high voltage.
10. The battery transfers charges from its negative terminal to its positive terminal. The battery is the source of charge, pumping charges into the circuit.
11. the battery sort of pumps charge through the wires, making the charge flow go from the low voltage end of the circuit to the high voltage end of the circuit. The light bulb will light up because the battery pumps charge through it.
12. The battery moves charges from its negative terminal to its positive terminal. In the process of doing this, it forces these charges through the lightbulb, and makes it light up.
13. The battery provides the electric power.
14. The battery provides current for the light bulb to light.
15. the battery increases the electrical potential energy by pushing charge up a voltage gradient. The battery does work by transferring charge from the negative end of the battery to the positive end. From the positive end, it can flow through the circuit, then end up at the negative end and repeat the process.
16. The battery increases the charges' electric potential energy to a higher voltage. By doing so, the battery provides electric power for the light bulb to make use of.
17. It pumps charge from low voltage to high voltage.
18. the battery "pumps" charge from the postive side of the battery through the wires and bulb (lights the bulb) to the negative side of the battery.
19. It has a certain amount of stored chemical energy that it can basically pump through the circuit, which passes through the lightbulb. The fillament takes that enegy and heats up which causes the light.
20. It acts as a pump in pumping charge from low voltage to high voltage. It is essentially what gives the light its energy. The electric current obtains power as it passes through the battery.
21. Wires connect the light bulb filament to both ends of the battery. The battery "pumps" charges from its negative terminal to its positive terminal. It increases a charge's electrostatic potential energy by pushing it up a voltage gradient, and this electrostatic energy becomes thermal energy in the atoms of the light bulb filament which causes the filament to glow.
22. The battery carries power to the light bulb, it "pumps" charge from low voltage to high voltage.

Question 3:

Answer:

1. The voltage is higher on the end through which current enters and is lower on the one through which current leaves. This is because the metal strip consumes the electric power and transfers it to heat, and thus losing voltage.
2. The end of the strip through which the current enters has a higher voltage since the strip of the rear defroster consumes power, causing the voltage to drop.
3. The one through which the current enters the strip. The voltage drop is caused by the electrostatic potential energy losing charge.
4. The higher voltage occurs where the current enters, and as it flows along the strip the voltage decreases. This decrease occurs because there is some resistance in the metal strip. Since current remains the same, and electrical resistance goes up, by the formula V=IR, voltage drop must increase.
6. The end of the metal strip through which current enters has the higher voltage. The consumption of power causes the voltage drop.
7. The current moves from high voltage to low voltage, so end of the strip where the current enters is higher. It moves across the strip to the lower voltage end. The drop in voltage is caused by the charges using up their energy. In this case, they are using up their energy by generating the heat to defrost the window.
8. The strip which the current leaves has the higher voltage. The voltage drop is caused by a battery.
9. The one through which the current enters the strip is the one with the higher voltage. The voltage drop is caused by collisions when they crash into tungsten atoms.
10. The positive end has the higher voltage. Voltage rises when the current transfers charge from then negative end to the positive end and drops when the current transfers charge from the positive end to the negative end. I think if the terminals alternate, the energy should be converted into thermal energy, heating the defroster.
11. The end of the strip where the current enters is the low voltage end because current flows from low voltage to high voltage. The voltage drop is caused by the loss of electric potential energy of each charge because of their movements through the wire.
12. The strip that current enters from has a higher voltage, and the one it exits through has a lower voltage. The drop in voltage is due to the defroster using charge to heat up the back window.
13. The metal strip through which the current enters has the higher voltage. As the car's rear defroster consumes electric power, the current passing through the metal strips moves down the voltage gradient and there is an overall drop in voltage.
14. The voltage is higher where the current enters and then decreases as it moves accorss the band. This drop is caused by the fact that the strip is not a perfect conductor and some of the power is lost.
15. the end where the current enters has the higher voltage. the voltage drop is caused by some of the energy in the metal strip to be turned into heat energy to defrost the windshield.
16. The voltage is higher where the the current enters the strip because some of the electric potential energy is converted to heat (the function of the defroster). This energy transfer results in a loss of voltage. The drop in voltage (and energy transfer) is a result of electrical resistance.
17. The strip that has the higher voltage is the one where the current enters, the strip with the lower voltage is where the current leaves. The voltage drop is due to the resistance of the defroster.
18. The higher voltage is in the one through which the current leaves because when a big current loses a lot of voltage, something will probably get hot and thats what the car's rear defroster depends on. A voltage drop is cause by the lose of electostatic PE that each coulomb of postive charge experiences while passing through the metal strip.
19. The end that enters the grid has more, because some of the energy that goes into the rid is transfered into heat energy, so when the current reaches the other side there is less energy left.
20. The one through which the current enters has the higher voltage because the metal strips will consume some of the electric power created by the electric current and this voltage drop will create heat for the rear defroster of the car. The metal strips consume electric power because the current passing through them slides down the voltage gradient and thus creates the overall drop in voltage.
21. The end of the strip through which current enters the strip has higher voltage, which then drops as the current passing through the strips slides down a voltage gradient. Each unit of charge loses electrostatic potential energy as the current passes through the metal strips which causes the voltage drop.
22. The end through which the current enters the strip has the higher volatage. Voltage drop is caused by a loss of current.

Question 4:

Answer:

1. The last section about Omhs Law was a little confusing.
2. I'm all set with the material in this reading.
3. Im a bit confused on the bubls and metal strips section.
4. How does a short circuit happen?
6. Bit confused with voltage drops and rises.
7. I think I'm good.
8. I am a little confused about how a battery works, and i also don't really understand the previous question about the defroster.
9. I didn't really understand the section about bulbs and voltage drops.
10. electric resistance
11. --
12. I think I understand most of the concepts from this reading.
13. I'm not positive about question 3. I'm also confused about the last check your figures in the section, #3.
14. Current and voltage are a little confusing.
16. i dont think so.
17. None :)
18. Voltage drop and rise.
19. I think I get all this.
20. I think I understood everything in the reading.
21. I was somewhat unclear on the idea of the "fictitious positive charges" and why we can and do pretend current is the flow of positive charges.
22. I was confused by ohms law, and had trouble applying it. I was also confused by question 3.

Question 5:

Answer:

1. I still have difficulty understanding electric fields.
2. I'm okay for now.
3. nothing at this time.
4. Nothing
6. nope
7. Nothing...
8. i think i am pretty caught up
9. Nothing really.
10. schematic diagrams- determining how bright the bulbs should be
11. --
12. I understand what we have been discussing in class.
13. I'd like to talk in class about how a copier works.
14. None thanks.
16. --
17. None
18. the path of least resistence (lab last week)
19. I still dont really understand why something like a lightning rod needs to have a pointed end. I dont understand what causes th difference between teh rounded and pointed ends.
20. I think I understood everything so far in class.
21. I think I just need some more practice applying previous material but don't have specific questions at this time.
22. N/A