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  4. In the circuit shown, the reading of the ammeter if diode is not ideal is

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Q. In the circuit shown, the reading of the ammeter if diode is not ideal isPhysics Question Image

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Solution:

$I=\frac{3\,V}{200\,\Omega}=15\,mA$
If diode is not ideal, it also has resistance then reading will be slightly less than $15 \,mA$, if it is ideal then it will be $15\, mA$.