NEET Physics: Electric Charges and Fields — MCQ Test 12

Q6. Two charges \( +11 \, \mu\text{C} \) and \( -5 \, \mu\text{C} \) are 80 cm apart. What is the electric field magnitude at the midpoint?

Q7. Two charges \( +8 \, \mu\text{C} \) and \( -4 \, \mu\text{C} \) are 40 cm apart. What is the electric field magnitude at the midpoint?

Q8. A thin spherical shell of radius 24 cm has a charge of \( 16 \, \mu\text{C} \). What is the electric field at a point 30 cm from the center?

Q9. What property of insulators causes charges to remain localized when applied to their surface?

Q10. Three charges \( +5 \, \mu\text{C}, -5 \, \mu\text{C}, +2 \, \mu\text{C} \) are at the vertices of an equilateral triangle of side 1.5 m. What is the force magnitude on \( +5 \, \mu\text{C} \)?

NEET Physics — Electric Charges and Fields

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Why does the electric field inside a charged conducting shell remain unaffected by charges placed outside it?

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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 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 Electric, Conducting, Unaffected, Vertices, Equilateral, and Triangle.

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. Why does the electric field inside a charged conducting shell remain unaffected by charges placed outside it?

  • A. Charge quantization
  • B. Field symmetry
  • C. No enclosed charge
  • D. Charge mobility

Q2. Three charges \( +5 \, \mu\text{C}, -3 \, \mu\text{C}, +4 \, \mu\text{C} \) are at the vertices of an equilateral triangle of side 1.5 m. What is the force magnitude on \( +5 \, \mu\text{C} \)?

  • A. 0.09 N
  • B. 0.10 N
  • C. 0.108 N
  • D. 0.12 N

Q3. A conducting sphere of radius 29 cm has a surface charge density of \( 50 \, \mu\text{C/m}^2 \). What is the total charge?

  • A. \( 5.0 \times 10^{-5} \, \text{C} \)
  • B. \( 5.2 \times 10^{-5} \, \text{C} \)
  • C. \( 5.27 \times 10^{-5} \, \text{C} \)
  • D. \( 5.3 \times 10^{-5} \, \text{C} \)

Q4. A dipole with charges \( +3 \, \mu\text{C} \) and \( -3 \, \mu\text{C} \) separated by 5 mm is in a field \( 8 \times 10^4 \, \text{N/C} \) at 45°. What is the torque?

  • A. \( 8.0 \times 10^{-4} \, \text{N m} \)
  • B. \( 8.48 \times 10^{-4} \, \text{N m} \)
  • C. \( 9.0 \times 10^{-4} \, \text{N m} \)
  • D. \( 9.5 \times 10^{-4} \, \text{N m} \)

Q5. A dipole with charges \( +5 \, \mu\text{C} \) and \( -5 \, \mu\text{C} \) separated by 3 mm is in a field of \( 2 \times 10^4 \, \text{N/C} \) at 45°. What is the torque?

  • A. \( 1.8 \times 10^{-4} \, \text{N m} \)
  • B. \( 2.12 \times 10^{-4} \, \text{N m} \)
  • C. \( 2.5 \times 10^{-4} \, \text{N m} \)
  • D. \( 3.0 \times 10^{-4} \, \text{N m} \)

+ 5 more questions in the actual test

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