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1.  36 mW

2.  12 mW

3.  144 mW

4.  64 mW

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. \( 10\text{ A}\)

3. \(1.43\text{ A}\)

4. \(3.13\text{ A}\)

The given graph represents the \(V\text-I\) characteristics of a semiconductor device. Which of the following statements is correct?
 

A Zener diode, having breakdown voltage equal to \(15\) V, is used in a voltage regulator circuit, as shown in the figure. The current through the diode is:

                      
1. \(10\) mA
2. \(15\) mA
3. \(20\) mA
4. \(5\) mA

A p-n photodiode is fabricated from a semiconductor with a band gap of $2.5<mspace\; width="1em"></mspace>\mathrm{eV}.$ It can detect a signal of wavelength 

1. $6000<mspace\; width="1em"></mspace>\stackrel{\circ }{\mathrm{A}}$                                   
2. $4000<mspace\; width="1em"></mspace>\mathrm{nm}$
3. $6000<mspace\; width="1em"></mspace>\mathrm{nm}$                                 
4. $4000<mspace\; width="1em"></mspace>\stackrel{\circ }{\mathrm{A}}$