NEET Physics: Electric Charges and Fields — MCQ Test 1

Q6. A closed surface has a net flux of \( 6.78 \times 10^5 \, \text{Nm}^2/\text{C} \). What is the charge enclosed?

Q7. A dipole with \( p = 7 \times 10^{-9} \, \text{C m} \) is at 45° to a field \( E = 4 \times 10^4 \, \text{N/C} \). What is the torque?

Q8. A charge of \( 11 \, \mu\text{C} \) is at the center of a cube of edge 45 cm. What is the total flux through the cube?

Q9. Two point charges \( -3 \times 10^{-7} \, \text{C} \) and \( 5 \times 10^{-7} \, \text{C} \) are 80 cm apart in vacuum. What is the magnitude of the force between them?

Q10. A dipole with moment \( p = 5 \times 10^{-9} \, \text{C m} \) is at 60° to a uniform field \( E = 4 \times 10^4 \, \text{N/C} \). What is the torque magnitude?

Q11. What explains why the electric field due to a dipole can be zero at certain points along its equatorial plane?

Q12. Two charges \( +5 \, \mu\text{C} \) and \( -7 \, \mu\text{C} \) are 35 cm apart. What is the electric field magnitude at the midpoint?

Q13. Three charges \( +8 \, \mu\text{C}, -4 \, \mu\text{C}, +2 \, \mu\text{C} \) are at the vertices of an equilateral triangle of side 1.8 m. What is the force magnitude on \( +8 \, \mu\text{C} \)?

Q14. 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 25 cm in the xy-plane?

Q15. A glass rod loses \( 6.4 \times 10^{-8} \, \text{C} \) of charge when rubbed with silk. How many electrons were transferred from it?

NEET Physics — Electric Charges and Fields

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Which principle underlies the fact that the electric field due to a system of charges can be analyzed by considering each charge independently?

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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 Principle, Underlies, Electric, Analyzed, Considering, and Independently.

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. Which principle underlies the fact that the electric field due to a system of charges can be analyzed by considering each charge independently?

  • A. Superposition
  • B. Charge quantization
  • C. Conservation of charge
  • D. Field symmetry

Q2. A dipole with charges \( +4 \, \mu\text{C} \) and \( -4 \, \mu\text{C} \) separated by 2 mm is in a field \( 7 \times 10^4 \, \text{N/C} \) at 30°. What is the torque?

  • A. \( 2.5 \times 10^{-4} \, \text{N m} \)
  • B. \( 2.8 \times 10^{-4} \, \text{N m} \)
  • C. \( 3.0 \times 10^{-4} \, \text{N m} \)
  • D. \( 3.2 \times 10^{-4} \, \text{N m} \)

Q3. A thin spherical shell of radius 22 cm has \( q = 15 \, \mu\text{C} \). What is the electric field at 26 cm from the center?

  • A. \( 1.9 \times 10^6 \, \text{N/C} \)
  • B. \( 1.95 \times 10^6 \, \text{N/C} \)
  • C. \( 1.98 \times 10^6 \, \text{N/C} \)
  • D. \( 2.0 \times 10^6 \, \text{N/C} \)

Q4. Three equal charges \( q = 3 \, \mu\text{C} \) are at the vertices of an equilateral triangle of side 1 m. What is the electric field at the centroid?

  • A. \( 0 \, \text{N/C} \)
  • B. \( 8.1 \times 10^5 \, \text{N/C} \)
  • C. \( 1.62 \times 10^6 \, \text{N/C} \)
  • D. \( 2.43 \times 10^6 \, \text{N/C} \)

Q5. Why does the electric field due to a uniformly charged infinite plane remain unaffected by the distance from the plane?

  • A. Charge quantization
  • B. Infinite extent
  • C. Field cancellation
  • D. Charge mobility

+ 10 more questions in the actual test

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