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Wheatstone Bridge

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Q. In a Wheatstone bridge, if the galvanometer shows a deflection, what does it indicate?
  • A. The bridge is balanced
  • B. The bridge is unbalanced
  • C. The resistances are equal
  • D. The current is zero
Q. In a Wheatstone bridge, if the galvanometer shows zero deflection, what can be inferred about the current?
  • A. No current flows
  • B. Current flows through the galvanometer
  • C. Current is maximum
  • D. Current is minimum
Q. In a Wheatstone bridge, if the galvanometer shows zero deflection, what does it indicate?
  • A. The bridge is balanced
  • B. The bridge is unbalanced
  • C. The current is zero
  • D. The resistances are equal
Q. In a Wheatstone bridge, if the known resistances are 5Ω and 10Ω, what is the unknown resistance if the bridge is balanced with a 15Ω resistor?
  • A. 7.5Ω
  • B. 10Ω
  • C. 12.5Ω
  • D. 15Ω
Q. In a Wheatstone bridge, if the ratio of resistances in one arm is 2:3 and in the other arm is 4:5, what is the condition for the bridge to be balanced?
  • A. 2/3 = 4/5
  • B. 2/3 = 5/4
  • C. 3/2 = 5/4
  • D. 3/2 = 4/5
Q. In a Wheatstone bridge, if the ratio of resistances in one arm is 2:3 and in the other arm is 4:5, what can be said about the bridge?
  • A. Balanced
  • B. Unbalanced
  • C. Cannot be determined
  • D. Short-circuited
Q. In a Wheatstone bridge, if the ratio of resistances P and Q is 2:3 and the ratio of resistances R and S is 4:5, what can be said about the bridge?
  • A. Balanced
  • B. Unbalanced
  • C. Cannot be determined
  • D. Short-circuited
Q. In a Wheatstone bridge, if the ratio of resistances R1 and R2 is equal to the ratio of R3 and R4, what can be said about the bridge?
  • A. The bridge is balanced.
  • B. The bridge is unbalanced.
  • C. The current through the galvanometer is maximum.
  • D. The potential difference across the galvanometer is maximum.
Q. In a Wheatstone bridge, if the ratio of resistances R1 to R2 is equal to the ratio of R3 to R4, what can be concluded?
  • A. The bridge is balanced.
  • B. The current through the galvanometer is maximum.
  • C. The potential difference across the galvanometer is maximum.
  • D. The resistances are equal.
Q. In a Wheatstone bridge, if the ratio of resistances R1 to R2 is equal to the ratio of R3 to R4, what can be said about the bridge?
  • A. The bridge is balanced.
  • B. The bridge is unbalanced.
  • C. The current through the galvanometer is maximum.
  • D. The potential difference across the galvanometer is maximum.
Q. In a Wheatstone bridge, if the ratio of the resistances in one arm is 2:3 and in the other arm is 4:5, what is the condition for the bridge to be balanced?
  • A. 2/3 = 4/5
  • B. 2/3 = 5/4
  • C. 3/2 = 5/4
  • D. 3/2 = 4/5
Q. In a Wheatstone bridge, if the resistance P is increased, what effect does it have on the balance condition?
  • A. Bridge remains balanced
  • B. Bridge becomes unbalanced
  • C. Bridge becomes short-circuited
  • D. Bridge becomes open-circuited
Q. In a Wheatstone bridge, if the resistance R2 is decreased, what effect does it have on the balance condition?
  • A. It will balance the bridge.
  • B. It will unbalance the bridge.
  • C. It has no effect.
  • D. It will increase the current.
Q. In a Wheatstone bridge, if the resistance R2 is doubled, what effect does it have on the balance condition?
  • A. It remains balanced.
  • B. It becomes unbalanced.
  • C. It requires R4 to be halved.
  • D. It requires R1 to be doubled.
Q. In a Wheatstone bridge, if the resistance R4 is adjusted to achieve balance, what does this imply about the other resistances?
  • A. They are equal.
  • B. They are in series.
  • C. They are in parallel.
  • D. They maintain a specific ratio.
Q. In a Wheatstone bridge, if the resistances are 1Ω, 2Ω, 3Ω, and 6Ω, is the bridge balanced?
  • A. Yes
  • B. No
  • C. Only if R4 is adjusted
  • D. Only if R3 is adjusted
Q. In a Wheatstone bridge, if the resistances are P = 5Ω, Q = 10Ω, R = 15Ω, what is the value of S for balance?
  • A. 7.5Ω
  • B. 10Ω
  • C. 12.5Ω
  • D. 15Ω
Q. In a Wheatstone bridge, if the resistances are R1 = 2Ω, R2 = 3Ω, R3 = 4Ω, what is the value of R4 for balance?
  • A. 6Ω
  • B. 8Ω
  • C. 12Ω
  • D. 1.5Ω
Q. In a Wheatstone bridge, if the supply voltage is 12V and the bridge is balanced, what is the voltage across each arm?
  • A. 6V each
  • B. 12V each
  • C. 4V each
  • D. 8V each
Q. What happens to the current in the galvanometer when the Wheatstone bridge is balanced?
  • A. Increases
  • B. Decreases
  • C. Becomes zero
  • D. Fluctuates
Q. What happens to the current through the galvanometer when the bridge is balanced?
  • A. It increases.
  • B. It decreases.
  • C. It becomes zero.
  • D. It becomes maximum.
Q. What happens to the current through the galvanometer when the Wheatstone bridge is unbalanced?
  • A. It becomes zero
  • B. It increases
  • C. It decreases
  • D. It becomes infinite
Q. What happens to the current through the galvanometer when the Wheatstone bridge is balanced?
  • A. It increases
  • B. It decreases
  • C. It becomes zero
  • D. It becomes infinite
Q. What happens to the current through the galvanometer when the Wheatstone bridge is perfectly balanced?
  • A. It flows in one direction.
  • B. It flows in both directions.
  • C. It is zero.
  • D. It is maximum.
Q. What happens to the galvanometer reading in a Wheatstone bridge when it is balanced?
  • A. It shows maximum current
  • B. It shows minimum current
  • C. It shows zero current
  • D. It shows fluctuating current
Q. What happens to the sensitivity of a Wheatstone bridge if the resistances are made equal?
  • A. Sensitivity increases
  • B. Sensitivity decreases
  • C. Sensitivity remains the same
  • D. Sensitivity becomes infinite
Q. What happens to the total resistance in a Wheatstone bridge when it is balanced?
  • A. It is maximum.
  • B. It is minimum.
  • C. It is equal to the sum of all resistances.
  • D. It is equal to the product of resistances.
Q. What is the condition for a Wheatstone bridge to be balanced?
  • A. R1/R2 = R3/R4
  • B. R1 + R2 = R3 + R4
  • C. R1 - R2 = R3 - R4
  • D. R1 * R2 = R3 * R4
Q. What is the condition for a Wheatstone bridge to be in a balanced state?
  • A. R1/R2 = R3/R4
  • B. R1 + R2 = R3 + R4
  • C. R1 - R2 = R3 - R4
  • D. R1 * R4 = R2 * R3
Q. What is the condition for a Wheatstone bridge to be in equilibrium?
  • A. R1/R2 = R3/R4
  • B. R1 + R2 = R3 + R4
  • C. R1 - R2 = R3 - R4
  • D. R1 * R3 = R2 * R4
Showing 91 to 120 of 142 (5 Pages)

Wheatstone Bridge MCQ & Objective Questions

The Wheatstone Bridge is a fundamental concept in electrical engineering and physics, making it a crucial topic for students preparing for exams. Understanding this concept not only enhances your grasp of circuit analysis but also boosts your performance in objective questions. Practicing Wheatstone Bridge MCQs and other practice questions can significantly improve your exam readiness and help you score better in important exams.

What You Will Practise Here

  • Understanding the principle of the Wheatstone Bridge
  • Key formulas related to resistance and current
  • Applications of the Wheatstone Bridge in measuring unknown resistances
  • Derivation of the balance condition in a Wheatstone Bridge
  • Diagrams illustrating the Wheatstone Bridge setup
  • Common variations and modifications of the Wheatstone Bridge
  • Real-life applications and significance in electrical measurements

Exam Relevance

The Wheatstone Bridge is frequently featured in various examinations, including CBSE, State Boards, NEET, and JEE. Students can expect questions that test their understanding of the bridge's operation, calculations involving resistance, and its applications. Common question patterns include numerical problems, theoretical explanations, and conceptual applications, making it essential to master this topic for success in competitive exams.

Common Mistakes Students Make

  • Confusing the balance condition with other circuit conditions
  • Misapplying formulas related to resistance and current
  • Overlooking the significance of the galvanometer in the bridge circuit
  • Failing to interpret circuit diagrams accurately

FAQs

Question: What is the main purpose of a Wheatstone Bridge?
Answer: The main purpose of a Wheatstone Bridge is to measure unknown electrical resistances by balancing two legs of a circuit.

Question: How does the Wheatstone Bridge work?
Answer: The Wheatstone Bridge works by comparing the ratio of two resistances in one leg of the circuit to the ratio of two known resistances in the other leg, allowing for precise measurement of unknown resistance.

Ready to enhance your understanding of the Wheatstone Bridge? Dive into our practice MCQs and test your knowledge today! Mastering these important Wheatstone Bridge questions for exams will give you the confidence you need to excel.

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