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1. The supply voltage to a system drops below the minimum voltage when the unit is operated. What could be causing this?
2. What color should the flames be in a correctly adjusted gas burner?
3. List the items to be checked when servicing a belt-drive system.
Find the mathematical expression for the current through the coil once the switch is closed. - Find the mathematical expression for the voltage across the coil during the same transient period.
A standard test for the operation of an FM system is to examine the output spectrum when modulated by a standard test tone. You're examining an FM broadcast tx modded by a 1kHz tone.
An amount of 7% of the delivered heat at the user's location is lost due to imperfect insulation. Calculate the energy and exergy efficiency of the system and its components.
A charged parallel-plate capacitor is disconnected from a battery, and the plates are pulled a small distance further apart. For the following quantities, indicate where they increase, decrease, or stay the same.
For the capacitor network shown in the Figure, the potential difference across ab is 220 V
A microstrip antenna system operating at 915MHz must be designed using Rogers RO3010 substrate with the thickness of 0.635mm. The microstrip antenna should be connected to a microstrip feeding line of Zf=50O through a quarter-wavelength
The figure shown below shows a one-line diagram of a simple power system containing a single 480 V generator and three loads. Assume that the transmission lines in this power system are lossless, and answer the following questions. Assume that..
Devise a circuit for a simple burglar alarm that activates a siren if either a motion sensor detects motion or a sensor on a window detects that the window is open.
a 9.1 v zener diode exhibits its nominal voltage at a test current of 28 mA . at this current the incremental resistance is specified as 5 ohms . find Vz0 of the zener model . find the zener voltage at a current of 10 mA and at 100 mA.
A 440-V, 60Hz, 4-pole, delta connected three phase induction motor has the following parameters in ohms/phase. R1= .3, X1= .9, R2=.6, X2=.9 Rc=150, Xm=60 If the rotational losses are 6% of the developed power A.) determine the efficiency when i..
The transistor Q1 in Figure has parameters β = 25, βR = 0.5, and VBE (on) = VBC(on) = 0.7 V. Find iB, iC , and iE for (a) v1 = 0, (b) v1 = 0.8 V, and (c) v1 = 3.6 V.
Derive the design equations for the circuit assuming D flip- flops as memory elements. Use the principle of partitioning for generating the state assignments.
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