Question 1 (3 points)
saved
(9.40_q1) which particle moves through a metal wire as electricity?

question 1 options:

protons

neutrons

electrons

atoms

question 2 (3 points)
saved
(9.40_q2) electrons move

question 2 options:

thru the circuit from the negative power terminal to the positive power terminal

thru the circuit from the positive power terminal to the negative power terminal

question 3 (3 points)
saved
(9.40_q3) the flow of electrons is called and is symbolized as i

question 3 options:

voltage

current

resistance

ohm

question 4 (3 points)
saved
(9.40_q4) the "force" causing electricity to flow is called

question 4 options:

voltage

current

resistance

ohms

question 5 (3 points)
(9.40_q5) the "force" opposing the flow of electricity is called

question 5 options:

voltage

current

resistance

amps

question 6 (3 points)
(9.40_q6) the current is measured in units of

question 6 options:

volts

ohms

amps

henrys

question 7 (3 points)
(9.40_q7) the voltage is measured in units of

question 7 options:

volts

amps

ohms

henrys

question 8 (3 points)
(9.40_q8) the resistance to the flow of electricity is measured in units of .

question 8 options:

volts

amps

ohms

henrys

question 9 (3 points)
(9.40_q9) when electricity goes through an electrical component it encounters a resistance to its flow. what happens to the voltage of the electricity as it goes through the component?

question 9 options:

the voltage is increased because of the electrical resistance.

the voltage is unchanged by the electrical resistance.

the voltage is decreased by the electrical resistance.

question 10 (3 points)
(9.40_q10) what happens if an led is installed backward in a circuit

question 10 options:

it works, but it glows with the wrong color.

it works and glows so brightly it can hurt your eyes.

it doesn't work. the electricity can't go backwards thru an led.

question 11 (3 points)
(9.40_q11) in a 3 volt circuit, a 10 ω (ohm) resistor is replaced with a 15 ω resistor. what will happen to the current?

question 11 options:

the current will increase.

the current will remain unchanged.

the current will decrease.

question 12 (3 points)
(9.40_q12) what is the current in a 9 volt circuit with 12 ω resistance?

question 12 options:

9 amp

1.33 amp

0.67 amp

0.75 amp

question 13 (3 points)
(9.40_q13) in a 12 volt circuit, a 20 ω resistor is replaced with a 12 ω resistor. what happens to the current?

question 13 options:

the current increases.

the current is unchanged.

the current decreases.

question 14 (3 points)
(9.40_q14) what kind of relationship exists between resistance and current?

question 14 options:

a direct relationship

no relationship

an inverse relationship

1. Electrons

2. thru the circuit from the negative power terminal to the positive power terminal

3. Current

4. Voltage

5. resistance

6. Amps

7. Volts

8. Ohms

9. The voltage is decreased by the electrical resistance.

10. It doesn't work. The electricity can't go backwards thru an LED.

11. The current will decrease.

12. 0.75 amps

13. The current increase

14. an inverse relationship

Explanation:

1. Electrons are what move through a circuit. These electrons are called mobile electrons. Unlike protons and neutrons, they are not confined in the nucleus and are free to move about.

2. Electrons tend to move towards the positive. When an electron moves to a stable atom,the atom would have too much electrons, making it negatively charged. This then would cause a chain reaction of passing on electrons to keep stable.

10.

3 to 8:

Collectively, the flow of electric current is dependent on four things: Voltage, current, resistance, and power.

Voltage is the like the driving force of current. It is the measure of the potential energy or electric potential difference between two points. The unit of voltage is volts, named after Alessandro Volta. You can think of volts as electrical pressure. The higher the voltage, the higher the pressure on the flow of charge.

Current is the "flow" of electrons. It could have another meaning though, in electronics, we refer to current as the volume of the flow of electrons. Current is measured in AMPERES or amps named after Andre M. Ampere. Current is a measure of rate, or the rate of the amount of electrons that flow through a certain point in a circuit, at a given time.

Resistance on the other hand is the opposing force. As electrons move along a circuit, there is bound to be friction. This friction opposes the movement of the electrons, which we call resistance. Resistance uses the unit ohms or the symbol Ω.

These three are all related. The flow of current is affected by how much voltage there is available or pressure available for the movement of the electrons, and at the same time, it is also affected to how much resistance there is in the circuit. And that is where Ohm's Law comes in.

9 and 11-14:

Ohm's Law describes the relationship between current, voltage and resistance. It can be summarized into this formula:

Where:

V = voltage

I = Current

R = Resistance

9. When electricity is met with an electrical component, the resistance through that part of the circuit increases. However, the resistance does not change the potential difference between the two points, but rather, it changes the amount of current that flows through. This means that it does not affect the voltage.

11. But on the other hand, for this scenario, the resistance was increased from 10 Ohms to 15 Ohms. Current and resistance have an indirect relationship. This means that as one goes up, the other goes down. As the resistance increases, the less current is able to flow through and thus the current will decrease.

12. Using Ohm's Law we can solve this:

The following is our given:

V = 9 V

R = 12 Ω

We plug that in our formula:

13. As mentioned earlier, current and resistance have an indirect relationship. So when you have this scenario where the resistance  chages from 20 Ω to 12Ω, you see that there is a decrease in resistance. This means that more current can flow through this circuit. So this means that the current increases.

14. was already explained above.

Hope this helps even just a little bit! Good Luck!

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