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

1.	\(2.5~\text A\)	2.	\(10.0~\text A\)
3.	\(1.43~\text A\)	4.	\(3.13~\text A\)

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 LED:

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. \(60~\text{Hz}\)

 
1. \(36~\text{mW}\)
2. \(12~\text{mW}\)
3. \(144~\text{mW}\)
4. \(72~\text{mW}\)

A Zener diode is used to obtain a constant voltage. If the applied voltage \(V\) changes, then:
(\( V\) is more than Zener voltage)
               

The combination of gates shown in the diagram is equivalent to:
              

1. OR
2. AND
3. NAND
4. NOT