$A$ semiconductor device $X$ is connected in series with a battery and a resistor. $A$ current of $10 \ mA$ is found to pass through the circuit. If the terminals of $X$ are connected in reverse,the current drops to almost zero. $X$ may be
- Aa zener diode
- Ba p-n junction diode
- Can intrinsic semiconductor
- Dan extrinsic semiconductor
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Explain the forward and reverse characteristics of the $p-n$ junction diode by drawing the circuit and graph.
For an ideal diode,the current in the following arrangement is:
In an unbiased $n-p$ junction,electrons diffuse from $n-$ region to $p-$ region because
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$A$ $2\,V$ battery forward biases a diode. There is a drop of $0.5\,V$ across the diode which is independent of current. Also,a current greater than $10\,mA$ produces large joule heat and damages the diode. If the diode is to be operated at $5\,mA$,the series resistance to be used is:
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