⟩ Once a low-pressure mercury vapour lamp has lit, the purpose of the choke/ballast unit is to
* a) Discharge voltage
* b) Correct power factor
* c) Suppress radio interference
* d) Limit lamp current
Answer – d
* a) Discharge voltage
* b) Correct power factor
* c) Suppress radio interference
* d) Limit lamp current
Answer – d
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