PHYSICS 112 FINAL QUESTIONS AND VERIFIED
ANSWERS
Lab 1: Why is it not possible to repeat measurements? (rod and cloth lab) - Answers -
the charge associated with the lab was not quantified and the charges were fleeting due
to natual humidity in the air.
Lab 2: why was the textbook placed on top of the paper when obtaining data? -
Answers - it allowed for the highest level of pressure and created less pockets of air.
This is important because air is a dialectric and the less air, the less possibility for errors
in the experiment.
Lab 3: How did you find diameter? - Answers - Using micrometer.
Why is finding diameter important? - Answers - it allows to find the area.
How would you make R vs A? - Answers - 8 thicknesses of wires, resistance all the
same, measure the wires and ensure they're all the same length.
Lab 4: How would you connect ammeter? - Answers - in series with the circuit.
voltmeter is parallel with circuit.
Lab 5: Why was there a difference in stopes? - Answers - different trials & terms in
each.
Lab 6: Why is it not beneficial to have an increase in time? - Answers - an increase in
time would lower the maximum current, which would cause a decrease in current.
Why does iron core increase current? - Answers - an increase in field strength would
increase the current.
Lab 7: Why trace two rays from each vertex? - Answers - in order to find where the
vertexes meet.
What if a third ray was traced? - Answers - they would all meet in the same spot,
converge.
Lab 8: How did lining pins help trace rays? - Answers - had to see what the pins would
look like inside a new medium to see new refraction.
Calculate percent error / percent difference? - Answers - MS - TS / MS *100
ANSWERS
Lab 1: Why is it not possible to repeat measurements? (rod and cloth lab) - Answers -
the charge associated with the lab was not quantified and the charges were fleeting due
to natual humidity in the air.
Lab 2: why was the textbook placed on top of the paper when obtaining data? -
Answers - it allowed for the highest level of pressure and created less pockets of air.
This is important because air is a dialectric and the less air, the less possibility for errors
in the experiment.
Lab 3: How did you find diameter? - Answers - Using micrometer.
Why is finding diameter important? - Answers - it allows to find the area.
How would you make R vs A? - Answers - 8 thicknesses of wires, resistance all the
same, measure the wires and ensure they're all the same length.
Lab 4: How would you connect ammeter? - Answers - in series with the circuit.
voltmeter is parallel with circuit.
Lab 5: Why was there a difference in stopes? - Answers - different trials & terms in
each.
Lab 6: Why is it not beneficial to have an increase in time? - Answers - an increase in
time would lower the maximum current, which would cause a decrease in current.
Why does iron core increase current? - Answers - an increase in field strength would
increase the current.
Lab 7: Why trace two rays from each vertex? - Answers - in order to find where the
vertexes meet.
What if a third ray was traced? - Answers - they would all meet in the same spot,
converge.
Lab 8: How did lining pins help trace rays? - Answers - had to see what the pins would
look like inside a new medium to see new refraction.
Calculate percent error / percent difference? - Answers - MS - TS / MS *100
