Question B.23: The ideal diode D in Figure B.14 will always conduct if: a. ...

The ideal diode D in Figure B.14 will always conduct if:
a. V_{1} is greater than V_{2}.            b. V_{2} is greater than V_{1}.
c. V_{1} is greater than 1 \mathrm{~V}.          d. R_{2} is an open circuit.
e. R_{1} is an open circuit.

b.14
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Using the methodology developed in Chapter 8, we assume that D conducts, resulting in the following expression for the diode current.

i=\frac{V_{1}-V_{2}}{R_{1}}

This expression will result in a positive current only if V_{1} is greater than V_{2}. When this condition applies, the assumption that the diode conducts is correct; thus, a is the correct answer.

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