1. | the positive terminal of the battery is connected to the p-side and the depletion region becomes thick. |
2. | the negative terminal of the battery is connected to the n-side and the depletion region becomes thin. |
3. | the positive terminal of the battery is connected to the n-side and the depletion region becomes thin. |
4. | the negative terminal of the battery is connected to the p-side and the depletion region becomes thick. |
Which one of the following statements is false?
1. | Pure Si doped with trivalent impurities gives a p-type semiconductor. |
2. | The majority of carriers in an n-type semiconductor are holes. |
3. | The minority carriers in a p-type semiconductor are electrons. |
4. | The resistance of intrinsic semiconductors decreases with an increase in temperature. |
To get an output Y = 1 from the circuit shown below, the input must be:
1. A=0 B=1 C=0
2. A=0 B=0 C=1
3. A=1 B=0 C=1
4. A=1 B=0 C=0
The symbolic representation of four logic gates is as shown:
(i) | (ii) | ||
(ii) | (iv) |
The logic symbols for OR, NOT, and NAND gates are respectively:
1. (iii), (iv), (ii)
2. (iv), (i), (iii)
3. (iv), (ii), (i)
4. (i), (iii), (iv)
A p-n photodiode is made of a material with a bandgap of 2.0 eV. The minimum frequency of the radiation that can be absorbed by the material is nearly:
1.
2.
3.
4.
The circuit is equivalent to:
1. AND gate
2. NAND gate
3. NOR gate
4. OR gate
In the following circuit, the output \(Y\) for all possible inputs \(A\) and \(B\) is expressed by the truth table:
1. | A | B | Y | 2. | A | B | Y |
0 | 0 | 0 | 0 | 0 | 1 | ||
0 | 1 | 0 | 0 | 1 | 1 | ||
1 | 0 | 0 | 1 | 0 | 1 | ||
1 | 1 | 1 | 1 | 1 | 0 | ||
3. | 0 | 0 | 1 | 4. | 0 | 0 | 0 |
0 | 1 | 0 | 0 | 1 | 1 | ||
1 | 0 | 0 | 1 | 0 | 1 | ||
1 | 1 | 1 | 1 | 1 | 1 |
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
Which of the following is an example of forward biasing?
1. | 2. | ||
3. | 4. |