Identify the incorrect statement from the following:
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. |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Of the diodes shown in the following diagrams, which one of the diodes is reverse biased?
1. | 2. | ||
3. | 4. |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
For the given circuit of the P-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. |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Reverse-bias applied to a junction diode:
1. | lowers the potential barrier |
2. | raises the potential barrier |
3. | increases the majority carrier current |
4. | increases the minority carrier's current |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
The barrier potential of a p-n junction diode does not depend on:
1. diode design
2. temperature
3. forward bias
4. doping density
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
In a half-wave rectification, what is the output frequency if the input frequency is \(50\) Hz?
1. | \(50~\text{Hz}\) | 2. | \(100~\text{Hz}\) |
3. | \(25~\text{Hz}\) | 4. | \(60~\text{Hz}\) |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
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:
1. | p-type semiconductor |
2. | insulator |
3. | metal |
4. | n-type semiconductor |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
The given circuit has two ideal diodes connected as shown in the figure below. The current flowing through the resistance R1 will be:
1. | 2.5 A | 2. | 10.0 A |
3. | 1.43 A | 4. | 3.13 A |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
The depletion layer in the P–N junction region is caused by:
1. | the drift of holes |
2. | diffusion of charge carriers |
3. | migration of impurity ions |
4. | drift of electrons |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
The LED:
1. is reverse-biased.
2. is forward-biased.
3. can be made of GaAs.
4. both (2) & (3) are correct.
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.