The plate characteristic curve of a diode in space charge limited region is as shown in the figure. The slope of curve at point $P$ is $5.0 m A / V$. The static plate resistance of diode will be
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When plate voltage in diode valve is increased from $100$ volt to $150$ volt then plate current increases from $7.5\ mA$ to $12\ mA$. The dynamic plastic resistance will be
Consider an NPN transistor amplifier in common-emitter configuration. The current gain of the transistor is $100.$ If the collector current changes by $1\ mA$, what will be the change in emitter current