PractiseQuestion bank
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12 questions
SA-9702-AC2-0011 markL1 FoundationCalculatorRectification
Half-wave rectification can be achieved using
Salam Academy Original Practice · Proposed mark scheme
SA-9702-AC2-0031 markL1 FoundationCalculatorRectification
A 50 Hz supply is full-wave rectified. State the frequency of the peaks in the output. Salam Academy Original Practice · Proposed mark scheme
SA-9702-AC2-0041 markL1 FoundationCalculatorSmoothing
The smoothing capacitor in a rectifier circuit is connected
Salam Academy Original Practice · Proposed mark scheme
SA-9702-AC2-0061 markL1 FoundationCalculatorRectification
State the number of diodes needed for a bridge rectifier.
Salam Academy Original Practice · Proposed mark scheme
SA-9702-AC2-0101 markL1 FoundationCalculatorRectification
A diode is used in rectification because it
Salam Academy Original Practice · Proposed mark scheme
SA-9702-AC2-0121 markL1 FoundationCalculatorRectification
Compared with half-wave rectification, full-wave rectification
Salam Academy Original Practice · Proposed mark scheme
SA-9702-AC2-0022 marksL2 StandardCalculatorSmoothing
A 470 μF smoothing capacitor is connected across a 1.0 kΩ load. Calculate the time constant. Salam Academy Original Practice · Proposed mark scheme
SA-9702-AC2-0051 markL2 StandardCalculatorSmoothing
Which change would reduce the ripple in a smoothed output?
Salam Academy Original Practice · Proposed mark scheme
SA-9702-AC2-0071 markL2 StandardCalculatorRectification
In a bridge rectifier, during each half-cycle
Salam Academy Original Practice · Proposed mark scheme
SA-9702-AC2-0081 markL2 StandardCalculatorSmoothing
Between peaks, the output of a smoothed rectifier falls because
Salam Academy Original Practice · Proposed mark scheme
SA-9702-AC2-0091 markL2 StandardCalculatorSmoothing
A full-wave rectified 50 Hz supply has peaks every 10 ms. The load is 2.0 kΩ. Calculate the capacitance needed for RC to be 50 times the time between peaks, in μF. Salam Academy Original Practice · Proposed mark scheme
SA-9702-AC2-0113 marksL3 ExamCalculatorSmoothing
A smoothing capacitor charges to a peak of 12.0 V, then discharges through the load with RC=0.20 s for 10 ms until the next peak. Calculate the ripple voltage (the drop in that time), in V. Salam Academy Original Practice · Proposed mark scheme