For the given circuit of the \(\mathrm{p\text-n}\) junction diode, which of the following statements is correct?

         

1.	In F.B. the voltage across \(R\) is \(V.\)
2.	In R.B. the voltage across \(R\) is \(V.\)
3.	In F.B. the voltage across \(R\) is \(2V.\)
4.	In R.B. the voltage across \(R\) is \(2V.\)

Reverse bias applied to a junction diode:

The barrier potential of a \(\mathrm{p\text-n}\) junction diode does not depend on:

Of the diodes shown in the following diagrams, which one of the diodes is reverse biased?
 

1.		2.
3.		4.

In a half-wave rectification, what is the output frequency if the input frequency is \(50~\text{Hz}?\)
1. \(50~\text{Hz}\)
2. \(100~\text{Hz}\)
3. \(25~\text{Hz}\)
4. \(60~\text{Hz}\)

In the energy band diagram of a material shown below, the open circles and filled circles denote holes and electrons respectively. The material is a/an: 
      

The given circuit has two ideal diodes connected as shown in the figure below. The current flowing through the resistance \(R_1\) will be:
       

The LED: