You connect two parallel plates to a 100 V difference in potential (electrostati

Question

You connect two parallel plates to a 100 V difference in potential (electrostatic voltage source). The left plate is connected to ground of electrostatic voltage source. Plate 2 is connected to +30V electrostatic voltage source

a) First: you leave the plates connected to the electrostatic voltage source and slowly separate the plates.

i. What will happen to ?V, the difference in potential between the plates, and E, the magnitude of the elelctric field between the plates?
?V decreases, E remains the same
?V remains the same, E increases
both ?V and E increase
?V decreases, E increases
?V increases, E remains the same
both ?V and E remain the same
both ?V and E decrease
?V increases, E decreases
?V remains the same, E decreases

ii. What will happen to Q, the charge on the plates, and C, the capacitance of the system?
Q decreases, C increases
Q increases, C decreases
Q increases, C remains the same
both Q and C increase
both Q and C decrease
Q decreases, C remains the same
both Q and C remain the same
Q remains the same, C decreases
Q remains the same, C increases


b) Now, suppose now you disconnect the electrostatic voltage source and then slowly separate the plates.

i.What will happen to ?V, the difference in potential between the plates, and E, the magnitude of the elelctric field between the plates?
?V remains the same, E decreases
both ?V and E remain the same
?V increases, E decreases
?V remains the same, E increases
?V decreases, E increases
both ?V and E increase
?V increases, E remains the same
both ?V and E decrease
?V decreases, E remains the same

ii. What will happen to Q, the charge on the plates, and C, the capacitance of the system?
Q increases, C remains the same
both Q and C increase
Q remains the same, C decreases
Q increases, C decreases
Q decreases, C remains the same
both Q and C decrease
Q remains the same, C increases
both Q and C remain the same
Q decreases, C increases

Explanation / Answer

i. What will happen to V, the difference in potential between the plates, and E, the magnitude of the elelctric field between the plates?
both V and E increase


ii. What will happen to Q, the charge on the plates, and C, the capacitance of the system?
Q remains the same, C decreases

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