Question

Two equal charges each of $10\mu C$ are placed at the two diametrically opposite point of a circle of radius $10cm$. Calculate the resultant field at the centre

• A. $10\times {10}^{-6}V{m}^{-1}$
• B. $10\times {10}^{6}V{m}^{-1}$
• C. Zero
• D. $20\times {10}^{-6}V{m}^{-1}$

Answer 1

The correct option is C Zero

Since each charge is of equal magnitude (i.e, $10\mu C$) and at equal distance ($10cm$) from center but electric field are opposite in direction but equal in magnitude. So, net electric field at center is zero.