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Q. A single-phase, two-winding, 10-kVA, 440:110- V, 60-Hz transformer is to be connected as an autotransformer to supply a load at 550 V from a 440-V supply. Draw a schematic diagram of the connections and determine:
(a) The maximum kVA rating as an autotransformer.
(b) The maximum apparent power transferred by conduction.
(c) The maximum apparent power transferred by electromagnetic induction.
Q. An n-channel JFET having V P = 3.5 V and I DSS = 5 mA is biased by the circuit of Figure with V DD = 28 V, RS = 3000 , and R 2 = 100 k. If the operating point is given by
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Q. How can a JFET be used as a constant current source? Explain from the drain characteristics. As the VDS voltage is increased from 0 to a few volts, the current will increase
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Q. (a) For a JKFFwith JK = 11, the output changes on every clock pulse. The change will be coincident with the clock pulse trailing edge and the flip-flop is said to toggle, when T
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Explain the term simplex transmission. Data in a simplex channel is always one method. Simplex channels are not frequently used because this is not possible to send back error
Q. How do you calculate the insulation resistance of transformer and what is the minimum value? Ans. The insulation resistance of the transformer will be calculated by using
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