In the a c circuit above the current value is - JAMB Physics 2000 Question

In the a.c circuit above, the current value is

A

0.58 A

B

3.00 A

C

4.00 A

D

6.67 A

correct option: c

Impedance Z =
√ R² x X² 

=
√ 30² x 40² 

∴Z =
√ 2500  = 50W

But current I = ^V/_Z = ²⁰⁰/₅₀ = 4.00 A

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