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Analogue Threshold switching
a) Include a variable potential divider to the schematic diagram to control the transistor base voltage
b) Include the potential divider components to your circuit and determine the threshold Switching voltage and value of the variable resistor at that point
c) Describe how the threshold point could be adjusted to cater for different resistances .
A 500KVA, 6 pole, 500v, 3 phase, wye-connected synchronous generator has a synchronous impedance of 0.1 + j1.5 ohms per phase. If the generator is driven at 1000 r.p.m., what is th
Interpoles and Compensating Windings: The most generally used method for aiding commutation is by providing the machine with inter poles, also known as commutating poles, or si
Briefly Explain i. Importance of thermal diffusivity. ii. Describe the laws governing Heat Transfer. iii. Differentiate between Heat Transfer and Thermodynamics iv. Des
explain electromechanical instrument
Design a logic circuit when to provide an output when any two or three of four switches are closed.
A pure sine wave with a frequency of 100Hz is sampled at 150Hz. At which one of the following frequencies would you expect an alias?
Quite often an amplifier is used as a component of an amplifier circuit. Consider the amplifier circuit shown in Figure, which contains an amplifier block as an internal component.
time period measurement
The field winding of a 200 V d.c. machine has a resistance of 20? and an inductance of 500mH. Calculate: (a) The time constant of the field winding (b) The value of curr
Q. Determine the synchronous speed in revolutions per minute and the useful torque in newton- meters of a 200-hp, 60-Hz, six-pole synchronous motor operating at its rated full load
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