Electrostatics Question 792
Question: Two points P and Q are maintained at the potentials of 10 V and -4 V, respectively. The work done in moving 100 electrons from P to Q is:
Options:
A) $ 9.60\times {{10}^{-17}}J $
B) $ -2.24\times {{10}^{-16}}J $
C) $ 2.24\times {{10}^{-16}}J $
D) $ -9.60\times {{10}^{-17}}J $
Show Answer
Answer:
Correct Answer: C
Solution:
[c] $ W _{PQ}=q( V _{Q}-V _{P} ) $
$ =( -100\times 1.6\times {{10}^{-19}} )( -4-10 ) $
$ =+2.24\times {{10}^{-16}}J $
