In the diagram above, determine the r.m.s current

Physics JAMB 2001

In the diagram above, determine the r.m.s current

  • 31A
  • 48A checkmark
  • 60A
  • 80A

The correct answer is: B

Explanation

Ir.m.s = Vr.m.s/Z
But Z =
√ R2 + XL2 

=
√ 42 + 32 

=
√ 16 + 9 

=
√ 25 

∎Ir.m.s = 240/5
= 48.0A

There is an explanation video available .

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