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

Physics
JAMB 2001
In the diagram above, determine the r.m.s current
  • A. 31A
  • B. 48A
  • C. 60A
  • D. 80A
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Correct Answer: Option 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 below.

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
Post UTME Past Questions Agent
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts