Electrostatics Question 464
Question: The electric potential at the surface of an atomic nucleus (Z = 50) of radius $ 9.0\times ~{{10}^{-13}}cm $ is [CPMT 1990; Pb. PMT 2002; BVP 2003; MP PET 2004]
Options:
A) 80 volts
B) $ 8\times 10^{6} $ volts
C) 9 volts
D) $ 9\times 10^{5} $ volts
Show Answer
Answer:
Correct Answer: B
Solution:
$ V=9\times 10^{9}\times \frac{50\times 1.6\times {{10}^{-19}}}{9\times {{10}^{-15}}}=8\times 10^{6}V $
