The figure shows a diagonal symmetric arrangement of capacitors and a battery. If the potential of C is zero, then identify the incorrect statement :
A
VA=+15V
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B
4(VA−VB)+2(VD−VB)=2VB
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C
4(VA−VD)+2(VB−VD)=4VD
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D
VA=VB+VD
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Solution
The correct option is AVA=+15V If 2μF were not present between Band D, then potential drop across upper 4μF will be less than potential drop across lower 2μF i.e.,
VA−VB<VA−VD⇒VB>VD
Now if 2μF is connected between B and D, charge will flow from B to D and finally VB>VD.