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.

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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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