An amplitude modulated waves is represented by expression ${\mathrm{v}}_{\mathrm{m}}=5\left(1+0.6 \cos 6280\mathrm{t}\right) \sin \left(211\times {10}^4\mathrm{t}\right) \mathrm{V}$. The minimum and maximum amplitudes of the amplitudes modulated wave are, respectively:

In the following digital circuit, what will be the output at $\mathrm{Z}$, when the input $\left(\mathrm{A},\mathrm{B}\right)$ are  $\left(1,0\right), \left(0,0\right), \left(1,1\right), \left(0,1\right)$

Take the breakdown voltage of the zener diode used in the given circuit as $6 \mathrm{V}$. For the input voltage shown in the figure below, the time variation of the output voltage is: (Graphs drawn are schematic and not to the scale)

Identify the operation performed by the circuit given below :

Two Zener diodes ($A$ and $B$) having breakdown voltages of $6 \mathrm{V}$ and  $4 \mathrm{V}$ respectively, are connected as shown in the circuit below. The output voltage $V_0$ variation with input voltage linearly increasing with time, is given by ($V_{input} = 0 \mathrm{V} \text{at} t = 0$)

Identify the correct output signal $Y$ in the given combination of gates (as shown $n$) for the given inputs $A and B$

The output characteristics of a transistor is shown in the figure. When ${\mathrm{V}}_{\mathrm{CE}}$ is $10\mathrm{V}$ and ${\mathrm{I}}_{\mathrm{C}}=4.0\mathrm{mA}$, then value of ${\mathrm{\beta }}_{\mathrm{ac}}$ is