Question

The potential at a point due to a charge of 5 x ${10}^{-7}$ C located 10 cm away is:

• A. 3.5 x ${10}^5$ V
• B. 3.5 x ${10}^4$ V
• C. 4.5 x ${10}^4$ V
• D. 4.5 x ${10}^5$ V

Answer 1

The correct option is C 4.5 x ${10}^4$ V

Given:

$Q=5\times {10}^{-7}C$

$k=9\times {10}^9$

$x=10cm=\frac{1}{10}m$

$P=Potential=\frac{kQ}{x}$

$P=\frac{9\times {10}^9\times 5\times {10}^{-7}}{1/10}$

$P=4.5\times {10}^{4}V$