The logic circuit shown has the input waveforms 'A' and 'B' as shown. Pick out the CORRECT output waveform :-

1. 

2. 

3. 

4. 

The circuit shown here is logically equivalent to:

1. OR gate

2. AND gate

3. NOT gate

4. NAND gate

In an NPN transistor circuit, the collector current is 10 mA. If 90% of the electrons emitted reach the collector, the emitter current($i_E$) and base current ($i_B$ are given by):-

1. $i_E=-1mA, i_B=9mA$

2. $i_E=9mA, i_B=-1mA$

3. $i_E=1mA, i_B=11mA$

4. $i_E=11mA, i_B=1 mA$

The figure shows two NAND gates followed by a NOR gate. The system is equivalent to the following logic gate:-

1. OR

2. AND

3. NAND

4. None of these

The combination of 'NAND' gates shown here under (figure) are equivalent to:-

1. OR gate and AND gate respectively

2. AND gate and NOT gate respectively

3. AND gate and OR gate respectively

4. OR gate and NOT gate respectively

In the circuit given below, V(t) is the sinusoidal voltage source, voltage drop $V_{AB}\left(t\right)$ across the resistance R is:-

1. Is half-wave rectified

2. Is full-wave rectified

3. Has the same peak values in the positive and negative half-cycles

4. Has different peak values in the positive and negative half-cycles

In the circuit shown in the figure, when the input voltage of base resistance is 10V, V_BE is zero and V_CE is also zero then what is the value of $\mathrm{\beta }$?

1. 133

2. 1330

3. 13.3

4. 1.33

Given circuit work as a full wave rectifier then input and output terminals will be respectively:-

1. A, D and B, C

2. B, C and A, D

3. A, B and C, D

4. A, C and B, C

Ge and Si diodes conduct at 0.3 V and 0.7 V respectively. In the following figure if Ge diode connection is reversed, the value of V₀ changes by:

1. 0.2 V

2. 0.4 V

3. 0.6 V

4. 0.8 V

Boolean output for $\mathrm{ABC}(\overline{\mathrm{A}}+\overline{\mathrm{B}}+\overline{\mathrm{C}})$ is:-

1. Zero

2. 1

3. A + B + C

4. ABC