define UPS's working principle ?
Answer / sanjay
An UPS is a device that allows a computer to keep running for at least a short time when primary power is lost. it also provides protection from power surges.
thats converting incoming AC to DC through a rectifier and converts it back with an inverter.
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What is the purpose of using data modem.
Explain we take the area of collector wide comparison to base and emitter. Why?
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Darlington is used for ??
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