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Q. Basic working of optical coupler?
The optical coupler is suitable for frequencies in the low megahertz range. The photodiode type shown above can handle only small currents; however, other types of couplers, combining phototransistors with the SCR, can be used where more output is required. Optical couplers are replacing transformers in low-voltage and low-current applications. Sensitive digital circuits can use the coupler to control large current and voltages with low-voltage logic levels
History of Transistor: The great Physicist Julius Edgar Lilienfeld filed the first patent for a transistor in Canada in the year 1925, explaining a device identical to a Field
SUB Instruction Op code format is of SUB instruction is Replace the three bit code of the register R from to obtain the op code of the required SUB instruction . o
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explain why entropy of a gas increases with volume and tempearture
Q. A 100-turn coil in the configuration of is rotated at a constant speed of 1200 r/min in a magnetic field. The rms induced voltage across the coil is 1 kV, and each turn has a le
up-down counter
Draw the circuit of transistor in the common base configuration. Draw the Active, saturation and cut-off region. List the characteristics of Ideal Op-Amp. Sketch the pin diagram
Octal Number Systems Now the question may arise in one mind that why to learn octal number system when neither human nor the digital systems uses. It hence it is
The transformer of Example is supplying full load (i.e., rated load of 50 kVA) at a rated secondary voltage of 240 V and 0.8 power factor lagging. Neglecting the exciting current o
what are the basic principles of shunt reactor and it''s operation system
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