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In the series a.c circuit shown above, the p.d across the inductor is 8Vr.m.s and...

Physics
JAMB 1999
In the series a.c circuit shown above, the p.d across the inductor is 8Vr.m.s and that across the resistor is 6Vr.m.s. The effective voltage is
  • A. 2V
  • B. 10V
  • C. 14V
  • D. 48V
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Correct Answer: Option B
Explanation
The effective V =
√ VR2 + VL2 

=
√ 62 + 82 

=
√ 36 + 64 

=
√ 100 

10V
Previous
Go back to Phy classroom

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WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709