Answer to Question 12

 

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The experimental data to give this graph are given below:

V1 = 300 V

d = 0.025 m

 

Use the graph above to calculate the gradient.  Hence work out a value for q/m.  Give the units.  Give your answer to an appropriate number of significant figures.

Gradient = rise run = 8.2 109 V2 0.25 T2 = 3.28 1010 V2 T-2

 

q/m = gradient (V1 d) = 3.28 1010 V2 T-2 (300 V (0.025 m)2 ) = 1.75 1011 N C-1 = 1.8 1011 N C-1 (to 2 s.f.)