Assertion :For reducing leakage leakage inductance energy must be absorbed by snubbers or clamps. Reason: Leakage inductance is usually the culprit of cross regulation effects observed on multiple output transformer based systems.
Snubbers or clamps are energy absorbing circuits used to suppress the voltage spikes cause by the circuits inductance. Leakage inductance result from the imperfect magnetic linkage between two windings can be reduced by maximizing the coupling between the two winding but cannot be made zero in practical. So, snubbers or clamps are used for absorbing these energy.