SOLUTION

(Open Circuit):- A two-terminal resistor is called an open circuit if its current i is identically zero irrespective of the voltage v; i.e., f(v,i) =i =0. The characteristic of an open circuit is the v axis in the v—i plane, with zero slopes (G = 0). In the i-v plane, it has an infinite slope, R —  ∞, as shown in fig.

An open circuit occurs when there’s no current flow for any applied voltage, like when you blow a fuse. Because there’s no current flow, there’s no power absorbed (p = 0 watts) in an open-circuit device.