In the circuit shown, V_C is 0 volts at t = 0 sec. For t > 0, the capacitor current i_C(t), where t is in seconds, is given by

For the circuit shown in the figure, the Thevenin voltage and resistance looking into X-Y are:

An independent voltage source in series with an impedance Z_s=R_s+jX_s delivers a maximum average power to a load impedance Z_L when

In the following scheme, if the spectrum M(f) of m(t) is as shown, then the spectrum Y(f) of y(t) will be: