What is the purpose of a ballast?

Answer

Ballast acts as a resistor in an electric circuit. It limits the amount of current in the circuit. It is often used in fluorescent lamps in the lamp starters.
Q&A Related to "What is the purpose of a ballast?"
Ballast in an aircraft is used to move the center of gravity (CG) to the required point. Weight and balance is used to keep safe operating parameters, and reduce fuel burn of an aircraft
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Ballast tank, a device used on ships and submarines.
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