In a p-n junction diode not connected to any circuit:
1. | the potential is the same everywhere. |
2. | the P-type is at higher potential than the N-type side. |
3. | there is an electric field at the junction directed from the N- type side to the P- type side. |
4. | there is an electric field at the junction directed from the P-type side to the N-type side. |
When a forward bias is applied to a p-n junction, then what happens to the potential barrier , and the width of charge depleted region x?
1. | \(V_B\) increases, x decreases | 2. | \(V_B\) decreases, x increases |
3. | \(V_B\) increases, x increases | 4. | \(V_B\) decreases, x decreases |
Which of the energy band diagrams shown in the figure corresponds to that of a semiconductor?
1. | 2. | ||
3. | 4. |
Which logic gate is represented by the following combination of logic gates?
1. OR
2. NAND
3. AND
4. NOR
The current through an ideal p-n junction diode shown in the circuit will be:
1. 5 A
2. 0.2 A
3. 0.6 A
4. Zero
A potential barrier of 0.50 V exists across a p-n junction. If the depletion region is m wide, the intensity of the electric field in this region is:
1. | \(1.0 \times 10^6 \mathrm{~V} / \mathrm{m}\) | 2. | \(1.0 \times 10^5 \mathrm{~V} / \mathrm{m}\) |
3. | \(2.0 \times 10^5 \mathrm{~V} / \mathrm{m}\) | 4. | \(2.0 \times 10^6 \mathrm{~V} / \mathrm{m}\) |
A and B are the inputs for the given logic gate. The output Y will be:
1. | 2. | ||
3. | 4. |
A Zener diode is shown in the following circuit diagram. When the source voltage fluctuates such that , then:
1. all the current I1, I2 and I3 change.
2. only I1 and I2 change and I3 remains constant.
3. only I1 and I3 change and I2 remains constant.
4. all the currents remain constant.
The net charges on -type semiconductor and -type semiconductor are, respectively:
1. Positive, negative
2. Negative, positive
3. Positive, positive
4. Zero, zero
In which of the following condition, diffusion current in junction is more than drift current?
1. | Forward biasing | 2. | Reverse biasing |
3. | No biasing | 4. | All of these |