An electric field greater than about 3×106v/m causes air to break down (electrons are removed from the atoms and then recombine, emitting light). if you shuffle along a carpet and then reach for a doorknob, a spark flies across a gap you estimate to be 1mm between your finger and the doorknob.

estimate the voltage between your finger and the doorknob.

Voltage, V = 3000 volts

Explanation:

Given that,

Electric field,

The gap between your finger and the doorknob is 1 mm

We need to find the voltage between your finger and the doorknob. We know that the relation between voltage and electric field is given by :

V = 3000 volts

So, the voltage between your finger and the doorknob is 3000 volts. Hence, this is the required solution.

the answer is to check all of them! they all apply well at least i think so!