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A center-tap full-wave rectifier uses two identical silicon diodes, each having a barrier potential of 0.7 V . The instantaneous AC voltage across each half of the secondary coil, measured with respect to the center tap, is given by V_s = 10 (100 t) volts. What is the instantaneous output voltage across the load resistor at t = 1 600 s ?

Options

  1. A5.0 V
  2. B4.3 V
  3. C3.6 V
  4. D9.3 V

Correct answer

B. 4.3 V

Step-by-step solution

The instantaneous voltage across one half of the secondary coil is given by V_s = 10 (100 t) . At t = 1 600 s , the phase angle is: = 100 1 600 = 6 rad The instantaneous secondary voltage is: V_s = 10 ( 6 ) = 10 0.5 = 5 V Since this voltage is positive, the corresponding diode is forward biased and conducts. For a silicon diode, the barrier potential is 0.7 V . In a center-tap full-wave rectifier, only one diode conducts at a time, so the voltage drop is due to a single diode. The instantaneous output voltage acros

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