The data in a laboratory got mixed up. There are two sets of data, shown below.

Question

The data in a laboratory got mixed up. There are two sets of data, shown below. One is the magnitude of the electric field a distance r from a point charge and the other is the magnitude of the magnetic field a distance rfrom a current-carrying wire, but the lab technicians don't know which set of data is which. What should they do to distinguish the two sets of data from each other and determine which is the electric field data and which is the magnetic field data? Describe in words what you would do to distinguish the two sets of data. Carry out your procedure. You may attach a separate sheet of paper if you wish. The data are shown below.

Explanation / Answer

The electric field is,

E = (1/4)(q/r2)………equation 1

And

Magnitude of magnetic field of current carrying conductor is,

B = oI/2r……………..…equation 2

Now, If we compare both the equation 1 and 2, we conclude that electric field fall off at (1/r2) and whereas magnetic field with (1/r).

i.e. the value of electric field decreases rapidly when the value of r is increases by small factor.

If we observe both te tables given,

It is clearly see the right hand side of the value of te right table changes rapidly. So it is the table of electric field at a distance r.

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