Three point charges `1C, 2C` and `3C` are placed at the corners of an equilaternal triangle of side `1m`. The work required to move these charges to the corners of a smaller equilaternal triangle of side `0.5 m` in two differenct ways as in fig. `(A)` and fig. `(B)` are `W_(a)` and `W_(b)` then:

Options

A. `W_(w) gt W_(b)`
B. `W_(a) lt W_(b)`
C. `W_(a)=W_(b)`
D. `W_(a)=0` and `W_(b)=0`

Answer

C

Explanation

Work done by external force `=DeltaU` [It is state function]