p-n Junction and Semiconductor Diode

Which of the following circuit diagram of p – n junction diode is (i) forward bias and in (ii) reverse bias:
    

The reverse current in a Zener diode starts increasing suddenly at a relatively low breakdown voltage of $5 \mathrm{V}$ or so. Is this statement true or false?

A light emitting diode (LED) has a voltage drop of $2 \mathrm{V}$ across it and passes a current of $10 \mathrm{mA}$. When it operates with $6 \mathrm{V}$ battery through a limiting resistor $R$, the value of $R$ is

In the semiconductor only the majority charge carriers will be present.

Define majority charge carriers.

Why does breakdown occur in reverse bias?

Reverse bias applied to a $p-n$ junction diode.

The majority current carriers in n-type semiconductor is 

Differentiate between the term breakdown voltage and Threshold voltage.

Beyond the threshold voltage, resistance offered by the diode is:

When a junction diode is reverse biased, the current called drift current is due to:

The drift current in a p−n junction diode is a motion of charge carriers due to the electric field and opposite in direction to the diffusion current

What is the current through an ideal $PN$-Junction diode shown in the figure below:-

Two identical PN junction are joined in series with a battery shown below. For which potential drop is same.

The circuit shown below contains two ideal diodes, each with a forward resistance of $50 \mathrm{\Omega }.$ If the battery voltage is $6 \mathrm{V},$ the current through the $100 \mathrm{\Omega }$ resistance (in amperes) is:

 

In figure, ${\mathrm{V}}_0$ is the potential barrier across a $\mathrm{p}-\mathrm{n}$ junction, when no battery is connected across the junction.

In the given circuit, Current through the battery is :-

The forward-bias voltage of a diode is changed from $0.6 \mathrm{V}$ to $0.7 \mathrm{V},$ the current changes from $5 \mathrm{mA}$ to $15 \mathrm{mA}.$ What is the value of the forward bias resistance?

In the circuit given below, the value of the current is

         

A forward biased diode is treated as