NEET Physics: Electric Charges and Fields — MCQ Test 21

Q6. A uniform electric field \( E = 4 \times 10^3 \, \text{N/C} \) is along the z-axis. What is the flux through a square of side 15 cm in the xy-plane?

Q7. Why can’t the electric field inside a charged insulator be zero, unlike in a conductor?

Q8. What property of electric charges explains why the smallest observable charge is that of an electron or proton?

Q9. Two point charges \( 5 \times 10^{-7} \, \text{C} \) and \( -7 \times 10^{-7} \, \text{C} \) are 150 cm apart in vacuum. What is the magnitude of the force between them?

Q10. A dipole with \( p = 6 \times 10^{-9} \, \text{C m} \) is at 60° to a field \( E = 7 \times 10^4 \, \text{N/C} \). What is the torque?

NEET Physics — Electric Charges and Fields

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A thin spherical shell of radius 8 cm has \( q = 4 \, \mu\text{C} \). What is the electric field at 10 cm from the center?

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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 Spherical, Electric, Infinite, Metallic, Distance, and Characteristic.

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 thin spherical shell of radius 8 cm has \( q = 4 \, \mu\text{C} \). What is the electric field at 10 cm from the center?

  • A. \( 3.0 \times 10^6 \, \text{N/C} \)
  • B. \( 3.2 \times 10^6 \, \text{N/C} \)
  • C. \( 3.4 \times 10^6 \, \text{N/C} \)
  • D. \( 3.6 \times 10^6 \, \text{N/C} \)

Q2. An infinite line charge has \( E = 5.4 \times 10^5 \, \text{N/C} \) at 6 cm. What is \( \lambda \)?

  • A. \( 1.6 \times 10^{-6} \, \text{C/m} \)
  • B. \( 1.7 \times 10^{-6} \, \text{C/m} \)
  • C. \( 1.75 \times 10^{-6} \, \text{C/m} \)
  • D. \( 1.8 \times 10^{-6} \, \text{C/m} \)

Q3. A metallic sphere of radius 15 cm has a charge of \( 6 \, \mu\text{C} \). What is the electric field just outside its surface?

  • A. \( 1.8 \times 10^6 \, \text{N/C} \)
  • B. \( 2.4 \times 10^6 \, \text{N/C} \)
  • C. \( 3.0 \times 10^6 \, \text{N/C} \)
  • D. \( 3.6 \times 10^6 \, \text{N/C} \)

Q4. Two charges \( +9 \, \mu\text{C} \) and \( -6 \, \mu\text{C} \) are 45 cm apart. What is the distance from \( +9 \, \mu\text{C} \) where the electric field is zero?

  • A. 25 cm
  • B. 28 cm
  • C. 29 cm
  • D. 30 cm

Q5. Which characteristic of insulators prevents them from shielding their interior from an external electric field?

  • A. Absence of free charges
  • B. High charge density
  • C. Field symmetry
  • D. Charge quantization

+ 5 more questions in the actual test

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