NEET Physics: Current Electricity — MCQ Test 16

Q6. A Wheatstone bridge has \( R_1 = 12 \, \Omega \), \( R_2 = 24 \, \Omega \), \( R_3 = 18 \, \Omega \). What is \( R_4 \) for balance?

Q7. A \( 5 \, \text{V} \) battery with \( 0.5 \, \Omega \) internal resistance is connected to a \( 4.5 \, \Omega \) resistor. What is the power dissipated in the external resistor?

Q8. A circuit has a \( 10 \, \text{V} \) battery with \( 1 \, \Omega \) internal resistance and three resistors \( 2 \, \Omega \), \( 4 \, \Omega \), \( 8 \, \Omega \) in parallel. What is the current through the \( 4 \, \Omega \) resistor?

Q9. In a circuit with parallel branches, why does the branch with the lowest resistance carry the highest current?

Q10. A \( 8 \, \Omega \) resistor carries a current of \( 2 \, \text{A} \) for \( 15 \, \text{s} \). What is the energy dissipated?

NEET Physics — Current Electricity

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In a circuit obeying Kirchhoff’s loop rule, what does a zero sum of potential changes around a closed loop imply?

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About this NEET MCQ Test

This page provides a free online MCQ test for NEET Physics preparation, focusing specifically on the chapter Current Electricity. It contains 10 carefully selected multiple-choice questions (MCQs) designed to test your conceptual understanding and exam readiness.

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Key concepts covered in this specific test include Kirchhoff, Potential, Wheatstone, Balanced, Difference, and Galvanometer.

Taking these timed MCQ tests helps you simulate the real NEET exam environment. Detailed step-by-step explanations are provided for every question to help you learn from your mistakes and strengthen your fundamentals.

Preview of Questions in this Test

Q1. In a circuit obeying Kirchhoff’s loop rule, what does a zero sum of potential changes around a closed loop imply?

  • A. Current is zero
  • B. Resistance is infinite
  • C. Energy is conserved
  • D. Voltage sources cancel out

Q2. In a Wheatstone bridge, when the bridge is balanced, what is the potential difference across the galvanometer?

  • A. Zero
  • B. Equal to the battery voltage
  • C. Half the battery voltage
  • D. Dependent on galvanometer resistance

Q3. A cell of emf \( 6 \, \text{V} \) and internal resistance \( 2 \, \Omega \) is connected to an external resistor \( 4 \, \Omega \). What is the terminal voltage across the cell?

  • A. \( 3 \, \text{V} \)
  • B. \( 4 \, \text{V} \)
  • C. \( 5 \, \text{V} \)
  • D. \( 6 \, \text{V} \)

Q4. A cell of emf \( 8 \, \text{V} \) and internal resistance \( 2 \, \Omega \) is connected to a \( 6 \, \Omega \) resistor. What is the terminal voltage?

  • A. \( 6.0 \, \text{V} \)
  • B. \( 6.5 \, \text{V} \)
  • C. \( 7.0 \, \text{V} \)
  • D. \( 8.0 \, \text{V} \)

Q5. Why does the terminal voltage of a battery decrease when current increases?

  • A. Emf decreases
  • B. External resistance increases
  • C. Internal voltage drop increases
  • D. Charge carriers slow down

+ 5 more questions in the actual test

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