Q70 / 90 · JEE Main 2021 (31 Aug Shift 2) · Physics

Statement I : To get a steady DC output from the pulsating voltage received from a full wave rectifier we can connect a capacitor across the output parallel to the load RL.
Statement II : To get a steady DC output from the pulsating voltage received from a full wave rectifier we can connect an inductor in series with RL.
In the light of the above statements, choose the most appropriate answer from the options given below :

  • A
    Both Statement I and Statement II are false
  • Correct answer
    B
    Both Statement I and Statement II are true
  • C
    Statement I is false but Statement II is true
  • D
    Statement I is true but Statement II is false

Solution

We can improve the average, DC output of the rectifier while at the same time reducing the A.C. variation of the rectified output by using smoothing capacitors to filter the output waveform. Smoothing or reservoir capacitors connected in parallel with the load across the output of the full-wave bridge rectifier circuit increase the average DC output level even higher as the capacitor acts like a storage device as shown below. Both Statement I and Statement II are true.

Hence, the correct answer is option: 'B'.

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