In a regulated power supply, components that conduct alternating current at the input before the transformer and direct current before the output are:

Why

Fuses are the only components listed that safely carry alternating current from the wall outlet into the power supply and then direct current after the rectifier stage without blocking the flow. The full explanation — and one for every question — is in Pro.

Practise this section

Power supplies is section A-004 of the Advanced exam: Power supplies: rectifiers, filtering, regulation, switching supplies and their failure modes.

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