An a c circuit of e m f 12V has a resistor of r... - JAMB Physics 2004 Question
An a.c circuit of e.m.f 12V has a resistor of resistance 8Ω connected in series to an inductor of inductive reactance 16Ω and a capacitor capacitive reactance 10Ω. The current flow in the circuit is
A
1.4A
B
1.2A
C
12.0A
D
14.0A
correct option: b
Current (I) in the circuit = V/Z
But z =
√ R2 + (XL - XC)2
=
√ 82 + (16 – 10) 2
=
√ 64 + 36
=
√ 100 = 10Ω
∴ Current (I) = V/Z = 12/10 = 1.2 A
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