NEET Physics: Electric Charges and Fields — MCQ Test 2

Q6. A point charge \( 7 \, \mu\text{C} \) is at the origin. What is the electric field magnitude at a point 4 m along the y-axis?

Q7. A plane sheet has \( \sigma = 8.85 \times 10^{-11} \, \text{C/m}^2 \). What is the electric field near it?

Q8. A point charge \( 15 \, \mu\text{C} \) is at the origin. What is the electric field magnitude at a point 6 m along the y-axis?

Q9. What ensures that the electric field is always radial for an infinitely long, uniformly charged wire?

Q10. What ensures that the electric field outside a uniformly charged spherical shell behaves as if all charge were concentrated at its center?

Q11. What principle explains why the net electric flux through a closed surface depends only on the charge enclosed within it?

Q12. A body loses \( 8.0 \times 10^{-8} \, \text{C} \) of charge when rubbed. How many electrons were transferred from it?

Q13. Three charges \( +6 \, \mu\text{C}, -3 \, \mu\text{C}, +3 \, \mu\text{C} \) are at the vertices of an equilateral triangle of side 1 m. What is the force magnitude on \( +6 \, \mu\text{C} \)?

Q14. A thin spherical shell of radius 32 cm has \( q = 9 \, \mu\text{C} \). What is the electric field at 25 cm from the center?

Q15. A thin spherical shell of radius 18 cm has a charge of \( 12 \, \mu\text{C} \). What is the electric field at a point 20 cm from the center?

NEET Physics — Electric Charges and Fields

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An infinite line charge has \( E = 4.5 \times 10^5 \, \text{N/C} \) at 4 cm. What is \( \lambda \)?

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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 Electric Charges and Fields. It contains 15 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 Infinite, Electric, Magnitude, Midpoint, Electrons, and Transferred.

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. An infinite line charge has \( E = 4.5 \times 10^5 \, \text{N/C} \) at 4 cm. What is \( \lambda \)?

  • A. \( 0.8 \times 10^{-6} \, \text{C/m} \)
  • B. \( 0.9 \times 10^{-6} \, \text{C/m} \)
  • C. \( 0.95 \times 10^{-6} \, \text{C/m} \)
  • D. \( 1.0 \times 10^{-6} \, \text{C/m} \)

Q2. Two charges \( +7 \, \mu\text{C} \) and \( -5 \, \mu\text{C} \) are 60 cm apart. What is the electric field magnitude at the midpoint?

  • A. \( 1.1 \times 10^6 \, \text{N/C} \)
  • B. \( 1.2 \times 10^6 \, \text{N/C} \)
  • C. \( 1.3 \times 10^6 \, \text{N/C} \)
  • D. \( 1.4 \times 10^6 \, \text{N/C} \)

Q3. A body loses \( 3.2 \times 10^{-8} \, \text{C} \) of charge when rubbed. How many electrons were transferred from it?

  • A. \( 2 \times 10^{11} \)
  • B. \( 2.5 \times 10^{11} \)
  • C. \( 3 \times 10^{11} \)
  • D. \( 4 \times 10^{11} \)

Q4. An infinite line charge produces \( E = 3.6 \times 10^5 \, \text{N/C} \) at 5 cm. What is \( \lambda \)?

  • A. \( 0.8 \times 10^{-6} \, \text{C/m} \)
  • B. \( 0.9 \times 10^{-6} \, \text{C/m} \)
  • C. \( 0.95 \times 10^{-6} \, \text{C/m} \)
  • D. \( 1.0 \times 10^{-6} \, \text{C/m} \)

Q5. A uniform field \( E = 7 \times 10^3 \, \text{N/C} \) is along the z-axis. What is the flux through a circle of radius 10 cm in the xy-plane?

  • A. 200 \( \text{Nm}^2/\text{C} \)
  • B. 210 \( \text{Nm}^2/\text{C} \)
  • C. 220 \( \text{Nm}^2/\text{C} \)
  • D. 230 \( \text{Nm}^2/\text{C} \)

+ 10 more questions in the actual test

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