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Motor and Circuit Lab Worksheet

This lab worksheet involves experiments with DC motors and measuring voltage, amperage, and resistance in series and parallel circuits. For the motor part, students will create a basic DC motor and observe how direction is affected by battery orientation. They will also explore how scraping the coating on the motor ends impacts spinning. For the circuits, students will set up series and parallel circuits with light bulbs and measure voltage and current at different points, calculating resistance. Comparing beginning and end measurements helps explain how electricity behaves in different circuit types.

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143 views4 pages

Motor and Circuit Lab Worksheet

This lab worksheet involves experiments with DC motors and measuring voltage, amperage, and resistance in series and parallel circuits. For the motor part, students will create a basic DC motor and observe how direction is affected by battery orientation. They will also explore how scraping the coating on the motor ends impacts spinning. For the circuits, students will set up series and parallel circuits with light bulbs and measure voltage and current at different points, calculating resistance. Comparing beginning and end measurements helps explain how electricity behaves in different circuit types.

Uploaded by

api-216124570
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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Name:_________________________

Science 9

Unit D Electricity

Lab Worksheet

Part one: Motors

1. Create a DC Motor by:


a) Put the two metal ends into the plastic battery case.
b) Put magnet into hole on top of plastic case.
c) Wrap your coil around the battery. Make sure to leave excess coil 180 degrees apart.
d) Put battery into case and place coil on the metal ends.
e) Write down your observations

Observations

2. Now take off metal coil. On both ends sticking our either side scrap off the coating on the TOP
HALF ONLY. Leave the bottom covered. Scrap the same half on the other end. Then place back on
your motor.

Observations

3. Why does one continuously spin and not the other?

4. Flip your battery around. Does it change the direction of coil spinning? Why or why not?

1
Part two: Measuring Voltage & Amps of Circuits

1. Create a series circuit containing one lightbulb.


a) Connect a voltmeter to the circuit before the electricity enters the light bulb (electricity
flows from – to +).
b) Record the Voltage: ___________________
c) Connect the voltmeter to the circuit after the electricity exits the light bulb.
d) Record the Voltage: ____________________
e) Is there a difference in Voltage? If so, why?

2. Repeat steps 1a- 1e but this time with an ammeter.


a) Amps before bulb:_________________
b) Amps after bulb:__________________
c) Is there a difference? If so, why?

3. Calculate the resistance before the bulb AND after the electricity goes through the bulb.
(V=IxR)

4. Create a Parallel Circuit with 2 bulbs.


a) Measure the voltage of the circuit at the beginning AND the end.
b) Records observations: Beginning_____________ & End______________
c) Is there a difference in Voltage?
5. Repeat using an ammeter
a) Record observations: Beginning_____________ & End______________
b) Is there a difference in Amps?

6. Calculate the resistance at the beginning of the circuit and at the end.

7. Now add 2 more bulbs onto your parallel circuit.


a) Measure the voltage and amps at the beginning and end of the circuit.

Volts: Amps:

b) Calculate the resistance for the beginning and end.

c) Does it differ from the 2 bulb parallel circuit? If so, why?

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