In lab we had to draw equipotential and electric field lines using a voltmeter o

Question

In lab we had to draw equipotential and electric field lines using a voltmeter on conductive paper in two different ways: a point charge and a line charge set up. We had to calculate the potential difference between equipotential lines using DeltaV=Ed. We were supposed to get similar numbers, which I did. Now, I'm just having trouble answering the questions. Help!

Question 1 The two field strengths you just calculated for the lines should be close to the same value. Why is that? What can you say about the electric field between the lines?
Question 2 If you tried the Number Crunching part on the Point Charge set-up, would you get numbers that have the same value? What does this tell you about the electric field in between the point charges?
Question 3 Describe [or draw] what the field lines would look like between point charges that are set up with potentials of 20 volts and 30 volts [instead of 0 volts and 10 volts].

Explanation / Answer

for the third one delta v would be the same so the diagrams would be the same.

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