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Q. Fixed Voltage Regulators ?
Positive voltage regulator series with seven voltage options - IC 7800 Series
The 7800 series consists of three - terminal positive voltage regulators with seven voltage options. The last two numbers "00" represents the output voltage of the regulator. These ICs are designed as fixed voltage regulators and with adequate heat sinking can deliver output currents in excess of 1A. These ICs also have internal thermal overlaod protection and internal short-circuit current limiting.As shown in figure, proper operation requires a common ground between input and output voltages. In addition, the difference between input and output voltages (Vin - Vo), called dropout voltage, must be typically 2.0 V.
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Q. Two 1150:115-V transformers are to be inter connected for (a) 2300:230-V operation, and (b) 1150:230-V operation. Show the interconnections and appropriate polarity markings.
Bus Interface Unit and implementation unit, are the two dissimilar functional units in 8086.
A three-phase, 220-V, 60-Hz, four-pole, wye connected induction motor has a per-phase stator resistance of 0.5 . The following no-load and blocked rotor test data on the motor are
Draw a relay construction diagram and briefly explain the operation of a relay. Define the terms normally open and normally closed. Define the terms Set and Reset for relays.
Q. Consider Figure of the weighted differencing amplifier. Let R 3 = R 1 and R 4 = R 2 . Determine the input resistance between terminals a and b of the circuit.
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Aplication of resonance in different divices
Q. Define waves and transmission lines? In basic circuit theory we neglect the effects of the finite time of transit of changes in current and voltage and the finite distances
(a) Describe why ordinary junction transistor is known as bipolar. (b) Describe working of NPN transistor as common Base configuration. Describe working of NPN transistor in
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