Question

Two point charges 20mC and - 60 mC are separated by a distance of 16cm. The net electric potential is zero on the line joining them

• A. At a distance of 4cm from 20mC in between the charges
• B. At a distance of 8cm from 20mC and 24cm from -60 mC
• C. Both of the above
• D. None of the above

Answer 1

The correct option is C Both of the above

$x=\frac{d}{\frac{q_2}{q_1}\pm 1};x_1=\frac{d}{\frac{q_2}{q_1}+1}=\frac{6}{\frac{60}{20}+1}=4cm{x}_2=\frac{16}{\frac{60}{20}-1}=\frac{16}{2}=8cm$
point outside