Batteries, Resistance, and Current

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Battery, resistance, and current

Go to http://phet.colorado.edu/en/simulation/battery-resistor-circuit

and click on Run Now.

Batteries, Resistance and Current

“Battery-Resistor”:
Check “show battery” and “show cores”, watch what happens, adjust some variables

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.
Answer:
The electrons move because they experience a electric current force in the wire. The battery causes an electric field and the electrons experience a force due to that field. The current flows in the opposite direction of the electrons and the flow of the …show more content…

For example, if you double its length, you will double its resistance.

Read more: http://wiki.answers.com/Q/As_a_wire_increases_in_length_what_happens_to_the_resistance_in_the_circuit#ixzz28XMG01Ig

4. If you increase the area (A) of the resistor. What changes? WHY?
Answer:
Objects of a uniform cross section have resistance thats proportional to its resistance and length and is inversely proportional to its cross-sectional area.

5. Write a summary about the different relationships you looked at in the properties and measurements of a resistor.
Answer:
The temperature is dependent on the resistivity of the conductor. Also the length of the conductor gives you different values for your resistance, to include the cross section area too.

“Ohm’s Law”:
In this sim, vary the values of Resistance (R), Current (I) and Voltage (V).

1. What are three different combinations of I and R which get a voltage of 6.0 Volts?
Answer:
If I = 10.5 mA and V = 570 Ω, I = 6 mA and R = 1000 Ω, and I = 15 mA and R = 400Ω.

2. Describe the relationship between I and R. Why is this?
Answer:
Resistance resists the free flow of electrical current. Thus as R is increased, the flow of current (I) slows down unless V, the voltage, is increased to compensate for the increase in R.

3. What would happen if you could decrease the resistance to 0? Explain.
Answer:
If the resistance

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