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Question:

In the circuit shown, what is the potential difference between x and y?

60 V

20 V

zero

120 V

Solution:

Given circuit is open, so there is no current flowing through the circuit. Therefore, the potential difference between x and y (Vxy) can be calculated as follows:

Vxy = i × 60 + 120 + i × 50

Since i (current) = 0 (because the circuit is open), the equation becomes:

Vxy = 0 × 60 + 120 + 0 × 50 = 120 V

Therefore, the potential difference between x and y is 120 V.

Option: D