NEET Physics: Current Electricity — MCQ Test 7

Q6. A cell of emf \( 6 \, \text{V} \) and internal resistance \( 1.5 \, \Omega \) is connected to a \( 4.5 \, \Omega \) resistor. What is the terminal voltage?

Q7. A wire of length \( 2 \, \text{m} \) and resistance \( 5 \, \Omega \) is stretched to \( 4 \, \text{m} \). What is the new resistance?

Q8. A \( 18 \, \text{V} \) battery with \( 3 \, \Omega \) internal resistance delivers a current of \( 2 \, \text{A} \) to a resistor. What is the resistance of the resistor?

Q9. A wire has a resistance of \( 24 \, \Omega \) at \( 25^\circ \text{C} \) and \( 25.8 \, \Omega \) at \( 75^\circ \text{C} \). What is the temperature coefficient of resistivity?

Q10. A nichrome wire has a resistance of \( 60 \, \Omega \) at \( 25^\circ \text{C} \) and \( \alpha = 1.7 \times 10^{-4} \, ^\circ\text{C}^{-1} \). What is its resistance at \( 225^\circ \text{C} \)?

NEET Physics — Current Electricity

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A \( 10 \, \text{V} \) battery with negligible internal resistance is connected to a cubical network of 12 resistors, each \( 1.5 \, \Omega \). What is the current through one edge from a corner?

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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 Negligible, Internal, Resistance, Connected, Resistors, and Sectional.

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. A \( 10 \, \text{V} \) battery with negligible internal resistance is connected to a cubical network of 12 resistors, each \( 1.5 \, \Omega \). What is the current through one edge from a corner?

  • A. \( 2.0 \, \text{A} \)
  • B. \( 2.5 \, \text{A} \)
  • C. \( 2.67 \, \text{A} \)
  • D. \( 3.0 \, \text{A} \)

Q2. A copper wire of cross-sectional area \( 8 \times 10^{-7} \, \text{m}^2 \) carries a current of \( 2 \, \text{A} \). If \( n = 8.5 \times 10^{28} \, \text{m}^{-3} \) and \( e = 1.6 \times 10^{-19} \, \text{C} \), what is the drift speed?

  • A. \( 1.6 \times 10^{-4} \, \text{m/s} \)
  • B. \( 1.84 \times 10^{-4} \, \text{m/s} \)
  • C. \( 2.0 \times 10^{-4} \, \text{m/s} \)
  • D. \( 2.2 \times 10^{-4} \, \text{m/s} \)

Q3. A conductor has a resistivity of \( 1.2 \times 10^{-7} \, \Omega \text{m} \) and \( \alpha = 4 \times 10^{-3} \, ^\circ\text{C}^{-1} \) at \( 20^\circ \text{C} \). What is its resistivity at \( 80^\circ \text{C} \)?

  • A. \( 1.4 \times 10^{-7} \, \Omega \text{m} \)
  • B. \( 1.45 \times 10^{-7} \, \Omega \text{m} \)
  • C. \( 1.488 \times 10^{-7} \, \Omega \text{m} \)
  • D. \( 1.5 \times 10^{-7} \, \Omega \text{m} \)

Q4. A cell of emf \( 10 \, \text{V} \) and internal resistance \( 1 \, \Omega \) is connected to a \( 9 \, \Omega \) resistor. What is the terminal voltage?

  • A. \( 9.0 \, \text{V} \)
  • B. \( 9.5 \, \text{V} \)
  • C. \( 10.0 \, \text{V} \)
  • D. \( 11.0 \, \text{V} \)

Q5. Two cells in parallel have emf \( 12 \, \text{V} \) and \( 3 \, \text{V} \) with internal resistances \( 4 \, \Omega \) and \( 1 \, \Omega \). What is the equivalent emf?

  • A. \( 4.5 \, \text{V} \)
  • B. \( 4.8 \, \text{V} \)
  • C. \( 5.0 \, \text{V} \)
  • D. \( 5.5 \, \text{V} \)

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