Bleeder transistor is added to prevent??
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it is used for discharging the electric charge stored in the power supply's filter capacitors when the equipment is turned off, for safety reasons.
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In electronics, a bleeder resistor is a resistorconnected in parallel with the output of a high-voltage power supply circuit for the purpose of discharging the electric charge stored in the power supply's filter capacitors when the equipment is turned off, for safety reasons. It eliminates the possibility of a leftover charge causing electric shock if personnel handle or service the equipment in the off state, believing it is safe. A bleeder resistor is usually a standard resistor rather than a specialized component.
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