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Logic Gates

Assume that t...

Question

Assume that the diode in the figure has $V_{o n} = 0.7 V$ , but is ideal otherwise the magnitude of the current $i$ (in mA) is equal to ___

0.6

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Solution

The correct option is A 0.6
Let assume diode os ON
$i_{1} = \frac{0.7}{1 K} = 0.7 m A$
$i = \frac{2.3}{4 k Ω} = 0.575 m A$
$i_{d} = i - i_{1} = - 0.125 m A$
$- v e$ diode current is not possible
$∴$ diode is OFF
$i = \frac{3}{5 K} = 0.6 m A$

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