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. \(60~\text{Hz}\)
For a transistor amplifier, the voltage gain:
1. | remains constant for all frequencies. |
2. | is high at high and low frequencies and constant in the middle-frequency range. |
3. | is low at high and low frequencies and constant at mid frequencies. |
4. | none of the above. |
If the input to the NOT gate is \(A\), its output is:
1. \(0\)
2. \(1\)
3. \(A\)
4. \(\overline{A}\)
1. | \(0^\circ-90^\circ\) | 2. | \(90^\circ-180^\circ\) |
3. | \(0^\circ-180^\circ\) | 4. | \(0^\circ-360^\circ\) |
1. | an open switch with infinite resistance. |
2. | a closed switch with a voltage drop of \(0\) V. |
3. | a closed switch in series with a battery with voltage of \(0.7\) V. |
4. | a closed switch in series with small resistance and a battery. |
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 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 |
Find the base resistance in the circuit below, if \(\beta_{DC} =90\) and \(V_{BE}=0.7~V.\)
1. 83
2. 41 k
3. 83 k
4. 41
The combination of gates shown below is equivalent to:
1. AND gate
2. XOR gate
3. NOR gate
4. NAND gate
1. | (i) < (ii) < (iii) | 2. | (iii) < (ii) < (i) |
3. | (ii) = (iii) < (i) | 4. | (i) = (iii) < (ii) |