ElectroMagnetic InductionHard
Question
A student connects a long air cored-coil of magnanin 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 reactant of the coil. is : -
Options
A.4 Ω
B.3 Ω
C.5 Ω
D.None
= 4Ω
= 5π ⇒ ωL = 3ΩMore ElectroMagnetic Induction Questions
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