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The following figure shows a composite switch consisting of a power transistor (BJT) in series with a diode. Assuming that the transistor switch and the diode are ideal, the I-V characteristic of the composite switch is

The following figure shows a composite switch consisting of a power transistor (BJT) in series with a diode. Assuming that the transistor switch and the diode are ideal, the I-V characteristic of the composite switch is Correct Answer <img alt="F1 U.B 12.8.20 Pallavi D10" src="//storage.googleapis.com/tb-img/production/20/09/F1_U.B_12.8.20_Pallavi_D10.png" style="width: 123px; height: 109px;">

[ alt="F1 U.B 12.8.20 Pallavi D12" src="//storage.googleapis.com/tb-img/production/20/09/F1_U.B_12.8.20_Pallavi_D12.png" style="width: 204px; height: 105px;">

Both the power transistor and the diode are ideal.

When voltage V is positive, both transistor and diode will be ON and making voltage across them zero and current I will be flowing.

⇒ at V = 0, I = Imaximum (∞)

When voltage V is negative, then both will be OFF and offering infinite resistance and hence voltage is maximum, and the current is zero.

⇒ at V = Vmax (∞), I = 0

Now, the V-I characteristics are as shown below.

[ alt="F1 U.B 12.8.20 Pallavi D13" src="//storage.googleapis.com/tb-img/production/20/09/F1_U.B_12.8.20_Pallavi_D13.png" style="width: 181px; height: 148px;">

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