The symbolic representation of four gates is shown as:
Pick out which ones are for AND, NAND, and NOT gates, respectively.
1. (i), (iv), and (iii)
2. (ii), (iii), and (iv)
3. (ii), (iv), and (iii)
4. (ii), (iv), and (i)
1. | the antimony becomes an acceptor atom |
2. | there will be more free electrons than holes in the semiconductor |
3. | its resistance is increased |
4. | it becomes a \(p\small{-}\)type semiconductor |
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 |