Circuit building Assignment

http://www.article19.com/shockwave/oz.htm (Old, may not work)

http://www.physicsclassroom.com/Physics-Interactives/Electric-Circuits/Circuit-Builder/Circuit-Builder-Interactive Better newer circuit builder but not perfect

Use Gizmos if possible

Intro to Electricity Assignment Name______________________

Use “the hand” to build each circuit and answer the following questions.

Round all measurements off to 2 significant digits.

1. Ohm’s Law . State ohm’s law. (refer to website)

In this circuit , R= _____ =

If the current increases, then the voltage will ________________

1. Equivalent Resistance of Series Circuit. Complete. Req=

Conclusion: the net resistance of resistors in series is equal to ..

3.. Equivalent resistance of Parallel Circuit. Complete. Req=

The net resistance of 2, 50 ohm resistors connected in parallel would be? (show calc)

1. Kirchoff’s Current Law. State this law.

Revise the circuit so that you have a 10 ohm and a 20 ohm resistor connected in parallel.

I in 20 ohm =______ I in 10 ohm = _______ I in battery = ________

Does the law work?

Which resistor draws more current? Why?

1. Current in a Series Circuit. What is the value of the current through each resistor?

1. Current in a Parallel Circuit. Replace the bulb with a 20 ohm resistor and complete the following. (either using the ammeter, or the voltmeter and ohm’s law)

I 20ohm =_______ I 100ohm=__________ I 100 ohm=__________

I battery =______________. I battery =I 20ohm+ ….

1. Kirchoff’s Voltage Law. Replace the 200 ohm with a 20 ohm and find the voltage across each resistor and the battery.

Draw the circuit and label the voltages and resistances beside each resistor and the battery.

In one path, there are two resistors with voltages of ___________ and ___________.

The sum of these 2 voltages = ________________

In the other path there is one resistor with a voltage of _____________

The voltage across the battery is _________________

8.Voltage in a Series Circuit. Let the hand build the circuit then replace the 200 ohm resistor with a 20 ohm resistor and complete the flowing chart

V (V) I (A) R ( )

A

B

C

Sum of 3 voltages___________ Voltage drop across battery_________

Conclusion

9. Short Circuit. Let the hand build the circuit. How much higher id the current in the short than through the resistor?

I short/ I resistor =___________

Now replace the 100 ohm resistor with a 10 ohm resistor and repeat the calculation.