In the diagram above determine the r m s current - JAMB Physics 2001 Question
A
31A
B
48A
C
60A
D
80A
correct option: b
Ir.m.s = Vr.m.s/Z
But Z =
√ R2 + XL2
=
√ 42 + 32
=
√ 16 + 9
=
√ 25
∴Ir.m.s = 240/5
= 48.0A
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