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In the fig above, XY is of length 1m, The value of R at balance...

Physics
JAMB 1994

In the fig above, XY is of length 1m, The value of R at balance point Z is

  • A. 3.0Ω
  • B. 13.3Ω
  • C. 15.0Ω
  • D. 30.0Ω
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
Correct Answer: Option D
Explanation

At null deflection, p.d across R = p.d across xz

p.d across 20Ω = p.d across zy 

\(\frac{R}{20}\) = \(\frac{60}{40}\)

R = 30Ω

 

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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
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