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.An inductor of inductance 10 H is connected across an a.c circuit source of 50 V,...

Physics
WAEC 2022

.An inductor of inductance 10 H is connected across an a.c circuit source of 50 V, 100 Hz. What is the current in the circuit? [\(\pi\) = 3.14]

  • A. 0.200A
  • B. 0.070A
  • C. 0.050A
  • D. 0.008A
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Correct Answer: Option D
Explanation

Given Data: L = 10, V = 50, F = 100, I = ?

Inductive Reactance [X\(_L\)] = 2\(\pi\)FL → 2 * 3.14 * 100 * 10

X\(_L\) = 6,280

Current[I] = \(\frac{V}{X_L}\) → \(\frac{50}{6280}\)

I = 0.0079 

≈ 0.008A 


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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
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
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709