From the following diode circuit, which diode is in forward biased condition:
1. | 2. | ||
3. | 4. |
\(A\) | \(B\) | \(Y\) |
\(1\) | \(1\) | \(1\) |
\(1\) | \(0\) | \(0\) |
\(0\) | \(1\) | \(0\) |
\(0\) | \(0\) | \(0\) |
1. | The resistivity of a semiconductor increases with an increase in temperature. |
2. | Substances with an energy gap of the order of \(10\) eV are insulators. |
3. | In conductors, the valence and conduction bands may overlap. |
4. | The conductivity of a semiconductor increases with an increase in temperature. |
Carbon, Silicon, and Germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented by , and respectively. Which one of the following relationships is true in their case?
1.
2.
3.
4.
1. | widens the depletion zone. |
2. | increases the number of donors on the n side. |
3. | increases the potential difference across the depletion zone. |
4. | increases the electric field in the depletion zone. |
1. | Concentration of positive and negative ions near the junction. |
2. | Concentration of positive charges near the junction. |
3. | Depletion of negative charges near the junction. |
4. | Increment in concentration of holes and electrons near the junction. |
Of the diodes shown in the following diagrams, which one of the diodes is reverse biased?
1. | 2. | ||
3. | 4. |
The truth table for the following network is:
1. |
|
|||||||||||||||
2. |
|
|||||||||||||||
3. |
|
|||||||||||||||
4. | None of the above |
Zener diode is used as:
1. Half-wave rectifier
2. Full-wave rectifier
3. AC voltage stabilizer
4. DC voltage stabilizer
The depletion layer has (for an unbiased \(\mathrm{p\text-n}\) junction):
1. electrons
2. holes
3. static ions
4. neutral atoms