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NEETPhysicsSemiconductors

A center-tap full-wave rectifier circuit uses two diodes D₁ and D₂ connected to the upper and lower ends of the secondary coil, respectively. The input AC voltage applied to the primary coil varies sinusoidally with time t , completing one full cycle in 40 ms , starting from zero with a positive slope at t=0 . Consider four specific instants of time: t=10 ms (Point A), t=20 ms (Point B), t=30 ms (Point C), and t=40 m

Options

  1. APoint C
  2. BPoint A
  3. CPoint B
  4. DPoint D

Correct answer

A. Point C

Step-by-step solution

The input voltage has a time period T = 40 ms . During the first half-cycle ( 0 During the second half-cycle ( 20 ms At points B ( t = 20 ms ) and D ( t = 40 ms ), the input voltage is zero, so neither diode is forward biased. Therefore, D₁ is reverse biased and D₂ is forward biased at Point C. Answer: Point C

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