The current through the ammeter (neglecting internal resistance) in the following circuit is

The current in the following circuit is:

Avalanche breakdown is due to

If the forward voltage in a semiconductor diode is doubled,the width of the depletion layer will

$A$ thermistor is usually made of......

Current $I$ through a given $p-n$ junction when a voltage $V$ is applied across it is given by $I = I_0 \left( e^{\frac{V}{2 V_T}} - 1 \right)$,where $I_0$ and $V_T$ are constants. If $r_d(I)$ is the dynamic resistance of the junction,then $r_d(1000 I_0) = \alpha r_d(10 I_0)$,where $\alpha$ is approximately equal to