PHY 221 Lab: Equipotential lines and electric field lines B. Two large metal pla

Question

PHY 221 Lab: Equipotential lines and electric field lines B. Two large metal plates are arranged as shown in the side view v E+50 yv5.0 right diagram below right. A power supply is connected between the plates so that the left plate has an electric potential of +5.0 V and the right plate has an electric potential of-5.0 V (Assume that the plates are sufficiently close together to ignore fringing effects.) Four locations between the plates (1-4) are marked on the diagram. Location I is directly above location 2. What is the potential difference between the plates? Explain. 1. Rank the locations 1-4 according to the electric potential at those points, from greatest to smallest. Cite specific results from the lab to support your answer. 2. 3. Rank the locations 1 - 4 according to the magnitude of the electric field at those points, from greatest to smallest. Cite specific results from the lab to support your answer. C. Consider a charged particle that is released from rest on a 12 V equipotential line. If the charged particle were a proton, would it move toward a region of higher potential or lower potential? Explain your reasoning. 1. 2. How, if at all, would your answer to part 1 be different if the charged particle were an electron instead of a proton? Explair.

Explanation / Answer

B)

1) Potential difference = Vleft - Vright = 5-(-5) = 10 V

2) electric field is directed from high potential to low potential so direction of electric field will be towards right

So V1 = V2 > V3 > V4

3) magnitude of electric field will be same thorough out

So E1 = E2 = E3 = E4

C)

1) positive charge experience Electric force along the direction of electric field and electric field is always directed from higher potential to lower potential so proton will move towards the direction of lower potential.

2) as per above explanation electron will move towards higher potential.

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