In case of half wave rectification the resistance of diode during negative half of A.C is:
Correct answer: A. Very high
- A. Very high
- B. Very low
- C. A few ohms
- D. Negative
Explanation
A half-wave rectifier converts an AC signal to DC by passing either the negative or positive half-cycle of the waveform and blocking the other. Half-wave rectifiers can be easily constructed using only one diode, but are less efficient than full-wave rectifiers. During negative half of half wave rectifier, the diode is reverse biased i.e the current of few ohms and hence very high resistance.
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Alternating current varies periodically, so phase relationships become essential when current passes through a resistor, capacitor or inductor. The chapter distinguishes resistance from capacitive and inductive reactance, explains phase lead and lag, and connects changing electric and magnetic fields with the production and properties of electromagnetic waves.
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