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A single phase fully controlled rectifier is supplying a load with an anti-parallel diode as shown in the figure. All switches and diodes are ideal. Which one of the following is true for instantaneous load voltage and current?

  1. $v_o \geq 0$ & $i_o<0$
  2. $v_o < 0$ & $i_o <0$
  3. $v_o \geq 0$ & $i_o \geq 0$
  4. $v_0 < 0$ & $i_o\geq 0$

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