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Q. Explain Crystal Oscillator
The frequency of a crystal-controlled oscillator is held constant to a high degree of accuracy by the use of a quartz crystal. The frequency depends almost entirely on the dimensions of the crystal (essentially its thickness); other circuit values have comparatively negligible effect. However, the power obtainable is limited by the heat the crystal will stand without fracturing. The amount of heating is dependent upon the r.f. crystal current which, in turn, is a function of the amount of feedback required to provide proper excitation. Crystal heating short of the danger point results in frequency drift to an extent depending upon the way the crystal is cut. Excitation should always be adjusted to the minimum necessary for proper operation.
A three-phase, 400-V, wye-connected induction motor takes the full-load current at 45 V with the rotor blocked. The full-load slip is 4%. Calculate the tappings k on a three-phase
Determine the equivalent resistance of circuit: Determine the equivalent resistance of network across the source terminals and find the current drawn from the source.
HOW CAN I MAKE THIS PROJECT?
The variable resistor Z o in the circuit shown in Fig. 1 is adjusted until maximum average power is delivered to Zo. a) Find the value of Z o b) Calculate the maximum av
explain inifinite bus
What we have seen for practical power supplies applies to any electrical circuit provided it contains only linear components
Q. Write and execute a PSpice programto analyze the resistor bridge circuit shown in Figure to solve for the node voltages and the voltage-source current. Then find the voltage acr
Q. Why we need digital systems? EASIER TO PROCESS: For the reason that digitized information breaks all information into discrete units the information is easier to process and
Four Quadrant Chopper or Class E chopper Figure class E chopper circuit Mode I When
Checking at Site - Testing of Meter The routine testing of meters should be carried out once in 3 years. Further, surprise checks should be conducted at the consumer's install
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