Discussion
What fraction of the cycle does each diode conduct in a bridge rectifier?
Answer: D
Each diode conducts for half the cycle, working with its diagonal partner, which is why the average current per diode is half the load current. With a capacitor filter the conduction narrows to a burst near each peak, so the last option describes a real effect but not the resistive-load case the question asks about. Establishing the resistive-load behaviour first and then adding the filter's effect is the reliable way through these circuits. Checking the units of each quantity catches a wrong formula before the arithmetic begins.
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