If a current I given by I=I0sin(ωt−π/2) flows in inductance in an AC circuit which an A.C potential E=E0sinωt has been applied, then power consumption P in the circuit will be
A
P=E0I0/√2
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B
P=EI/√2
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C
P=E0I0/2
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D
zero
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Solution
The correct option is C zero P=Vr.m.s×Ir.m.s×cosϕ=12E0×I0cosπ/2=0