A resistor circuit is constructed such that 12 resistor are arranged to form a cube as shown in fig. Each resistor has a resistance of `2Omega.` The potential difference of 30V is applied across two of the opposing points as shown

In question 20, the potential difference between the points C and G is

Options

A. 12V
B. 10V
C. 20V
D. 7.5V

Answer

A

Explanation

D, B, and E are are symetrical
to A, hence potential at these
points is same. Similarly , C,
F, and H are symmetrical
to G. So potential at these
points is the same.

Resulting diagram will be
as shown : C, D, F, and E will
be at the same potential.
Potential difference between
C and G will be half to the applied potential, i.e.,
`V_(CG) = 30//2 = 15V`