Classify these signals into energy-type signals, power-type signals, and signals that are neither energy-type nor power-type signals. For energy-type and power-type sig- nals, find the energy or the power content of the signal. 1. x1(t) = (e cos t) u-1(1) 2. x2(t) = e cost 3. x3(t) = sgn(t) 4. x4(1) = A cos 21 fit + B cos 2n fat %3D

33. A voltage divider circuit is used for a resistive sensing-element that has (a) large resistance measurement (b) small resistance measurement

Q) referring to Frgure below. cCircuit) a Vx t ly 10< -10°A (4) - Jlon o.) Find Curmnt Iy and Voltage Vx b) if the terminel a-b is short -Cir cuited, Find the new Current Iy Value.

The IT servers for a medium-sized company need to be protected fromgrid failures (e.g. blackout) and thus is powered through anuninterruptable power supply (UPS) unit. The UPS consists of a 3-phase diode rectifier powering the dc bus, which then splits between a3-phase inverter unit and a battery energy storage system (BESS). UPSparameters are given in Table B2 and a general schematic is shown inFigure B2.a) Assuming that the inverter and BESS pull a combined constant current,IDC, from the dc bus, draw the approximate waveforms over one full accycle for: (i) the three ac line voltages, (ii) the three ac currents, and(iii) the total dc bus voltage.