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  4. Figure shows a full-wave rectifier with a smoothing capacitor <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/physics/5a225d2cb1a3075810100df3a2338120-.png /> The currents I1 and I3 vary with time as shown in figure next <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/physics/2a40baf6da30ff55673ef599885e274f-.png /> Which of the graphs a-d shown in fig. best represents the variation of the current I2, with time?

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Q. Figure shows a full-wave rectifier with a smoothing capacitor
image
The currents $I_{1}$ and $I_{3}$ vary with time as shown in figure next
image
Which of the graphs $a-d$ shown in fig. best represents the variation of the current $I_{2}$, with time?

Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

From Kirchhoff's law, $I_{1}+I_{2}=I_{3}$
Hence $I_{2}=I_{3}-I_{1}$