After walking across a dry carpet, there's a potential difference of 4400 V between your hand and the doorknob. As you reach toward the knob, a spark jumps, releasing energy 1.0 μJ .
You only wrote the statement of the problem, but I found some questions that I think are what you want:
a.- How much charge was transferred?
The charge can be calculated with this expression for energy:
Where q is charge and V is voltage. So:
ANSWER
b.- Assuming all the charges were electrons, how many were there?
Charge is given by:
ANSWER
I hope it helps!!
After walking across a dry carpet, there's a potential difference of 4400 V between your hand...
Review PartA Suppose that after walking across a carpeted floor you reach for a doorknob and just before you touch it a spark jumps 0.40 cm from your finger to the knob 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 x 106 V/m. Express your answer using two significant figures Submit Request Answer Provide Feedback Next >
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