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A 2H inductor has negligible resistance and is connected to a \(\frac{50}{\pi}\) Hz A.C supply....

Physics
JAMB 2021

A 2H inductor has negligible resistance and is connected to a \(\frac{50}{\pi}\) Hz A.C supply. The reactance of the inductor is?

  • A. 200\(\Omega\)
  • B. 50\(\Omega\)
  • C. \(\frac{100}{\pi}\)
  • D. \(\frac{25}{\pi \Omega}\)
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Correct Answer: Option A
Explanation

Given;

L = 2H
F = \(\frac{50}{\pi}\) H\(_{2}\)
X\(_{L}\) = ?

X\(_{L}\) = 2\(\pi\)fL = 2\(\pi\) x \(\frac{50}{\lambda}\) x 2

= 200\(\Omega\)

There is an explanation video available below.


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Explanation Video

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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 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 offline past questions - with all answers and explanations in one app - Download for free
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995