- #1
Nitrate
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1. During a Millikan oil drop experiment, a student recorded the weight of 5 different oil drops. A record was also made of the Electric field intensity necessary to hold the drop stationary between thew two horizontal plates.
Data:
Weight x 10^-14 N
1.7
2.9
4.0
5.6
6.1
[Electrostatic field intensity] x 10^5 N/C
1.1
1.8
2.5
3.5
3.8
Q: Charge
n: integer
e: elementary charge
[E]: electrostatic field intensity
2. Slope = Rise/Run
Q = ne
3.
a) Using [E] as the manipulated variable, plot a graph showing the relationship between the weight and the electric field. (I've done this.)
b) Using only the graph, determine the elementary charge (hint: what is the physical meaning of the slope of the graph.)
Work for b) I've calculated the slope using the data [the graph is a straight line]:
Slope = y2 - y1 / x2 - x1
(3.8x10^5 N/C) - (1.1x10^5 N/C) / (6.1 x 10^-14 N) - (1.7x10^-14 N)
and this results in 6.1 x 10^-18 N^2/C [Rounded]
I am now stuck.
I have no clue what the unit N^2/C means, or how the number I found will help me find the elementary charge.
Data:
Weight x 10^-14 N
1.7
2.9
4.0
5.6
6.1
[Electrostatic field intensity] x 10^5 N/C
1.1
1.8
2.5
3.5
3.8
Q: Charge
n: integer
e: elementary charge
[E]: electrostatic field intensity
2. Slope = Rise/Run
Q = ne
3.
a) Using [E] as the manipulated variable, plot a graph showing the relationship between the weight and the electric field. (I've done this.)
b) Using only the graph, determine the elementary charge (hint: what is the physical meaning of the slope of the graph.)
Work for b) I've calculated the slope using the data [the graph is a straight line]:
Slope = y2 - y1 / x2 - x1
(3.8x10^5 N/C) - (1.1x10^5 N/C) / (6.1 x 10^-14 N) - (1.7x10^-14 N)
and this results in 6.1 x 10^-18 N^2/C [Rounded]
I am now stuck.
I have no clue what the unit N^2/C means, or how the number I found will help me find the elementary charge.