A Wheatstone bridge is balanced when:

A All resistors are equal

B R₁/R₂ = R₃/R₄ (ratio of opposite arms are equal)

C Voltage is zero

D Current is maximum

✓ Correct Answer: Option B

Balanced Wheatstone bridge: R₁R₄ = R₂R₃ (or R₁/R₂ = R₃/R₄). No current through the galvanometer.

💡 Why is B) the correct answer?

The correct answer to the question "A Wheatstone bridge is balanced when:" is Option B: R₁/R₂ = R₃/R₄ (ratio of opposite arms are equal).

The other options — A) All resistors are equal, C) Voltage is zero, D) Current is maximum — are incorrect for this FE Exam Prep question. As explained above: Balanced Wheatstone bridge: R₁R₄ = R₂R₃ (or R₁/R₂ = R₃/R₄). No current through the galvanometer.

📚 About This FE Exam Prep Practice Question

This 2-level FE Exam Prep question from the Circuits topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free FE Exam Prep practice test or use flashcards for spaced repetition review.

Practice FE Exam Prep Quizzes → Browse All Questions Study Flashcards

A Wheatstone bridge is balanced when:

✓ Correct Answer: Option B

📚 About This FE Exam Prep Practice Question

Related FE Exam Prep Questions