JEE Main 2022 · 28 Jun · Shift 2 · Physics Q49

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PhysicsSingle correct+4 / -1Question 49 of 90

In the given circuit the input voltage $V_{in}$ is shown in figure. The cut-in voltage of p-n junction diode ( $D_1$ or $D_2$ ) is 0.6 V. Which of the following output voltage ( $V_o$ ) waveform across the diode is correct ?

Input: sine wave V_in against t with dashed lines at +0.6 V and −0.6 V; circuit: AC source V_in in series with R Ω feeding two diodes D1 and D2 in parallel, in opposite directions, with the output v_o taken across them.

Full sine wave

Positive half cycles only

V_o against t: positive half cycle, then zero.

Clipped at +0.6 V on both half cycles

V_o against t: flat tops at 0.6 V in both half cycles, all above the axis.

Clipped at +0.6 V and −0.6 V

V_o against t: clipped at +0.6 V in the positive half and −0.6 V in the negative half.

Answer and worked solution

Official answer: D

Antiparallel diodes across the output: $D_1$ conducts above $+0.6$ V and $D_2$ below $-0.6$ V, so the output is clipped at $\pm0.6$ V.

(D)

Topics:Semiconductors and p-n junction

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JEE Main 2022 · 28 Jun · Shift 2, Physics question 49