Batteries and Resistance
Batteries, Resistance and Current
“Battery-Resistor”:
Check “show battery” and “show cores”, watch what happens, adjust some variables
1. Why do electrons (blue dots) move? Draw a diagram of the battery, label the flow of electrons. The flow of current (+) is opposite; draw this and note if toward or away from + terminal of the battery.
The blue dots indicating the electrons move because there is a voltage across the battery in which the electrons flow away from the positive terminal of the battery.
2. What does the Ammeter (on the left) measure? How is this shown in the sim?
The ammeter measures the flow of current through the system.
3. What role do the “green dots” in the resistor play in the sim? What do you think they represent? What does this tell you about the effect of resistors in a circuit?
The green dots in the resistor work in the simulation to slow the flow of current through the system. The green dots represent the resistance to current flow. This tells us that in a circuit resistance works to impede the flow of current. The more resistance the slower or less the amount of current that is able to flow through the system at one time. The less resistance the more current is able to flow through the system.
4. Increase the resistance (# green dots). What affect does this have on temperature? WHY? Increasing the resistance in the simulation makes the green dots bigger and slows the flow of current through the system. As resistance is increased the temperature decreases because less current it flowing through the battery to heat it up.
5. When the circuit gets hotter, what affect does this have on current? Explain using kinetic-molecular theory.
When the circuit gets hotter this is due to either more voltage being added to the system and or less resistance to current flow. When the circuit gets hotter the speed of the current and the amount of the current flowing through the battery at one time
“Battery-Resistor”:
Check “show battery” and “show cores”, watch what happens, adjust some variables
1. Why do electrons (blue dots) move? Draw a diagram of the battery, label the flow of electrons. The flow of current (+) is opposite; draw this and note if toward or away from + terminal of the battery.
The blue dots indicating the electrons move because there is a voltage across the battery in which the electrons flow away from the positive terminal of the battery.
2. What does the Ammeter (on the left) measure? How is this shown in the sim?
The ammeter measures the flow of current through the system.
3. What role do the “green dots” in the resistor play in the sim? What do you think they represent? What does this tell you about the effect of resistors in a circuit?
The green dots in the resistor work in the simulation to slow the flow of current through the system. The green dots represent the resistance to current flow. This tells us that in a circuit resistance works to impede the flow of current. The more resistance the slower or less the amount of current that is able to flow through the system at one time. The less resistance the more current is able to flow through the system.
4. Increase the resistance (# green dots). What affect does this have on temperature? WHY? Increasing the resistance in the simulation makes the green dots bigger and slows the flow of current through the system. As resistance is increased the temperature decreases because less current it flowing through the battery to heat it up.
5. When the circuit gets hotter, what affect does this have on current? Explain using kinetic-molecular theory.
When the circuit gets hotter this is due to either more voltage being added to the system and or less resistance to current flow. When the circuit gets hotter the speed of the current and the amount of the current flowing through the battery at one time