Question

Q17.When a.c. passes through pure inductor then *

(a) e.m.f. leads the current by π/2

(b) e.m.f. lags the current by π/2

(c) e.m.f. leads the current by π/4

(d) e.m.f.and current are in the same phase

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Answer 1

When a.c. passes through pure inductor then 

(c) e.m.f. leads the current by π/4