Logic gates \(X\) and \(Y\) have the truth tables shown below:
\(X\) | ||
\(P\) | \(Q\) | \(R\) |
\(0\) | \(0\) | \(0\) |
\(1\) | \(0\) | \(0\) |
\(0\) | \(1\) | \(0\) |
\(1\) | \(1\) | \(1\) |
\(Y\) | |
\(P\) | \(R\) |
\(0\) | \(1\) |
\(1\) | \(0\) |
When the output of \(X\) is connected to the input of \(Y\), the resulting combination is equivalent to a single:
1. NOT gate
2. OR gate
3. NAND gate
4. AND gate
The output in the circuit shown in the figure taken across a capacitor is:
1. | 2. | ||
3. | 4. |
1. | the drift of holes. |
2. | diffusion of charge carriers. |
3. | migration of impurity ions. |
4. | drift of electrons. |
1. | (i) < (ii) < (iii) | 2. | (iii) < (ii) < (i) |
3. | (ii) = (iii) < (i) | 4. | (i) = (iii) < (ii) |
The combination of gates shown below is equivalent to:
1. AND gate
2. XOR gate
3. NOR gate
4. NAND gate
The given circuit has two ideal diodes connected as shown in the figure below. The current flowing through the resistance \(R_1\) will be:
1. | \(2.5\) A | 2. | \(10.0\) A |
3. | \(1.43\) A | 4. | \(3.13\) A |
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. | \(\mathrm{p}\text-\)type semiconductor |
2. | insulator |
3. | metal |
4. | \(\mathrm{n}\text-\)type semiconductor |
The LED:
1. is reverse-biased.
2. is forward-biased.
3. can be made of \(\mathrm{GaAs}\).
4. both (2) & (3) are correct.
1. | \(0,0\) | 2. | \(5~\text{mA},5~\text{mA}\) |
3. | \(5~\text{mA},0\) | 4. | \(0,5~\text{mA}\) |
1. | only if both inputs are zero. |
2. | \(1\). | if either or both inputs are
3. | \(1\). | only if both inputs are
4. | if any of the inputs is zero. |