question_answer

In the given circuit if point C is connected to the earth and a potential of \[+\,2000\,V\] is given to the point A, the potential at B is                                     [MP PET 1997; Pb. PET 2003]

A)            \[1500\,V\]

B)                    \[1000\ V\]

C)                    \[500\ V\]

D)                    \[400\ V\]

Correct Answer: C

Solution :

           The given circuit can be redrawn as follows \[({{V}_{A}}-{{V}_{B}})=\left( \frac{15}{5+15} \right)\times 2000\]  Þ \[{{V}_{A}}-{{V}_{B}}=1500\,V\] Þ \[2000-{{V}_{B}}=1500V\] Þ \[{{V}_{B}}=500V\]