It is postulated that the radial electric field of a group ofcharges falls off a

It is postulated that the radial electric field of a group ofcharges falls off as where is the distance from the center of thegroup and is an unknown exponent. To test this hypothesis you makea field probe consisting of two needle tips spaced apart. Youorient the needles so that a line between the tips points to thecenter of the charges and then use a voltmeter to read thepotential difference between the tips. After you take measurementsat several distances from the center of the group your data are asfollows: