A) Two parallel plates are connected to a 40 V battery. The distance between the

Question

A) Two parallel plates are connected to a 40 V battery. The distance between the two plates is 24 cm. What is the magnitude, in V/m, of the electric field between the two plates?

______ V/m

B) Two parallel plates, connected to a 70 V battery, are separated by an air gap. If the plates get close enough, the electric field will exceed the breakdown value of E for air. (A *spark* will occur!) We observe sparking between the plates when the distance is reduced to 18 cm, what is the breakdown value for the air (in V/m)?

______ V/m

Explanation / Answer

i think that a) 22.5 V/m b) 12.63 V/m

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