Parallel Circuit

1. Parallel Circuits - https://phet.colorado.edu/en/simulation/legacy/circuit-
construction-kit-dc
1. Using batteries and bulbs (as resistors) set up the following circuit:
2. Properly place an ammeter into the circuit and measure the total
current in amps (A):
Total Current =
3. Properly place an ammeter into the circuit and measure the current
through in each of the bulbs:
Current in bulb 1 =
Current in bulb 2 =
4. Draw the three circuits you just made to measure the current.
Using symbols to show how you connected the ammeter:
Disconnect the ammeter and re-set up the circuit.
5. Measure the voltage across each bulb:
V1 = V V2 = V
6. Using the equation V
R
I
 calculate the resistance of each bulb.
7. What is the total resistance of the two bulbs together?
Rtotal =

2. Parallel Circuits - https://phet.colorado.edu/en/simulation/legacy/circuit-
construction-kit-dc
8. Using your measured values for current (I) and total resistance (R)
confirm Ohm’s Law: V=IR and predict what the total voltage is.
VT =
9. Measure the actual total voltage across the all the batteries?
Voltage =
The measure voltage will likely be different because your measured
values of current and resistance contain error.