Suppose that after walking across a carpeted floor you reach for a doorknob and

Question

Suppose that after walking across a carpeted floor you reach for a doorknob and just before you touch it a spark jumps 0.80 cm from your finger to the knob.

Part A

Find the minimum voltage needed between your finger and the doorknob to generate this spark. The minimum field that can produce a spark in air is 3.0×106V/m .

Suppose that after walking across a carpeted floor you reach for a doorknob and just before you touch it a spark jumps 0.80 cm from your finger to the knob.

Part A

Find the minimum voltage needed between your finger and the doorknob to generate this spark. The minimum field that can produce a spark in air is 3.0×106V/m .

Explanation / Answer

minimum voltage V = Emin * r

Vmin = 3*10^6 * 0.80*10^(-2)

Vmin = 20400 V.

In this solution are completed

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