Alternating CurrentHard
Question
A student connects a long air cored - coil of manganin wire to a 100 V D.C. supply and records a current of 25 amp. When the same coil is connected across 100 V. 50 Hz a.c. the current reduces to 20 A , the reactance of the coil is :-
Options
A.4 Ω
B.3 Ω
C.5 Ω
D.None of these
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