A 500 W discharge lamp takes a current of 4 A at unity p.f. Find the i – McqOptions

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1.	A 500 W discharge lamp takes a current of 4 A at unity p.f. Find the inductance of a choke required to enable the lamp to work on 250 V, 50 Hz main.
A.	1.72 mH
B.	17.2 mH
C.	0.172 H
D.	0.172 mH
Answer» D. 0.172 mH

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