Question

Two point charges, q and Q, are separated as shown in the Figure 5. Determine the
electric potential difference between points X and Y.
$NB:1/4\pi {ϵ}_0=9.0x{10}^{9}N{m}^2{C}^{-2}$; potential at a point distance, r from a charge, q is given by
$v=\frac{q}{4\pi {ϵ}_{0}r}$

• A. 8.4 V
• B. 7.2 V
• C. 6.0 V
• D. 0.0 V

Answer 1

The correct option is B 7.2 V

$Q=-3nC$
$q=-3nC$
$rqX=3mrqY=5m$
$rQX=5mrQY=3m$
$where=9\times {10}^{9}m{F}^{-1}$
$V_X-V_Y=7.2V$