Final answer:
To determine the instantaneous energy stored in the transformer wirings at t=0, you need to know the self-inductance of the transformer and the instantaneous current at t=0.
Step-by-step explanation:
The instantaneous energy stored in the transformer wirings at t=0 can be determined using the formula:
Instantaneous Energy = (1/2) x L x IS^2
where L is the self-inductance of the transformer and IS is the instantaneous current at t=0.
To find the self-inductance, we need more information.