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Introduction to Electricity

In the circui...

Question

In the circuit shown in figure, $V_{D}, V_{R}$ and $I_{D}$ are respectively

A

0.3 V, 7.3 V, and 0.32 mA

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B

0.7 V, 0.73 V, and 3.32 mA

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C

0.7 V, 7.3 V, and 3.32 mA

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D

0.3 V, 8 V, and 0.32 mA

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Solution

The correct option is C $0.7 V, 7.3 V, and 3.32 mA$
Given, $E = 8 V$

For silicon diode , $V_{D} = 0.7 V$

Using KVL we get,

$V_{R} = E - V_{D} = 8 - 9.7 = 7.3 V$

Now the current flow through the diode is,

$I_{D} = I_{R} = \frac{V_{R}}{R} = \frac{7.3}{2.2 \times 10^{3} Ω} \approx 3.32 mA$

 Hence, $(C)$ is the correct answer.

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