Electric Potential (In need of serious help because I missed Lab ! ) Based off t

Question

Electric Potential

(In need of serious help because I missed Lab ! )

Based off theory and not actual measurements how would I measured the electric potential of these concentric circles?

Place the concentric circles side of the paper face-up on the card- board. Connect the positive lead of the power supply to the inner circle and the ground lead of the supply to the outer circle. Use the connecting wires supplied and the thumbtacks to make a "good connection to the inked circles, as shown below Check your prediction by measuring the electric potential at the center of the circle. Then move the probe around and measure the potential at all locations inside the inner circle. Connecting Pushpin or Thumbtackish pin wire IT Inked "Electrode Paper Electrode 2. Clearly explain why the electric potential inside the circle is con- stant Adjust the power supply to 20 V Connect the negative lead of the voltmeter to ground. The positive lead of the voltmeter can now be placed anywhere on the paper to measure the electric potential. Touch the voltmeter to various loca- tions on the circles. Every location on the inner circle should read 20 V and every location on the outer circle should read 0 V, within some reasonable uncertainty. If this is not the case, contact your in structor 3. Move the probe around in the space between the two circles until it reads 5 V. Trace the location of all points between the circles where the potential is 5 V. This collection of points is an equipoten- tial surface. Locate the 10 V and 15V equipotential surfaces. Plot the location of all three surfaces roughly to scale in the space be- low 1. What do you predict will be the electric potential at the center of the inner circle? Clearly explain your reasoning

Explanation / Answer

1) dV = E.dr

change in electric potential = 0 , if Electric field = zero

since electric field inside the inner circle is zero so electric potential will be constant inside the inner circle.

so electric potential at the centre of circle will be 20V

2)

dV = E.dr

change in electric potential = 0 , if Electric field = zero

since electric field inside the inner circle is zero so electric potential will be constant inside the inner circle.

3) Just draw the concentric circles in between inner circle & outer circle

4) YES, Electric field is towards the outer circle , Electric field is constant

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