The electric potential at a point in free space due to a charge Q coulomb is Q × 10 11 V. The electric field at that point is
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A
Search for the relations of electric potential and electric field at a particular point At any point, electric potential due to charge Q is
V = 
..........(i)
where r is the distance of observation point from the charge.
At the same point electric field is
E = 
..........(ii)
Combining Eqs. (i) and (ii), we have
E = 
= 4πε 0 Q × 10 22 V/m
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