NEET Physics: Electric Charges and Fields — MCQ Test 16

Q6. What causes the electric field to be discontinuous across a charged surface, such as a thin sheet?

Q7. A thin spherical shell of radius 19 cm has \( q = 7 \, \mu\text{C} \). What is the electric field at 15 cm from the center?

Q8. A dipole with charges \( +6 \, \mu\text{C} \) and \( -6 \, \mu\text{C} \) separated by 2 mm is in a field \( 8 \times 10^4 \, \text{N/C} \) at 60°. What is the torque?

Q9. A uniform electric field \( E = 6 \times 10^3 \, \text{N/C} \) is along the z-axis. What is the flux through a square of side 50 cm in the xy-plane?

Q10. A dipole with \( p = 8 \times 10^{-9} \, \text{C m} \) is at 90° to a field \( E = 6 \times 10^4 \, \text{N/C} \). What is the torque?

NEET Physics — Electric Charges and Fields

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A dipole with charges \( +6 \, \mu\text{C} \) and \( -6 \, \mu\text{C} \) separated by 4 mm is in a field \( 5 \times 10^4 \, \text{N/C} \) at 60°. What is the torque?

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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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10
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Key concepts covered in this specific test include Separated, Infinite, Electric, Distance, Property, and Intersect.

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 dipole with charges \( +6 \, \mu\text{C} \) and \( -6 \, \mu\text{C} \) separated by 4 mm is in a field \( 5 \times 10^4 \, \text{N/C} \) at 60°. What is the torque?

  • A. \( 0.9 \times 10^{-3} \, \text{N m} \)
  • B. \( 1.04 \times 10^{-3} \, \text{N m} \)
  • C. \( 1.2 \times 10^{-3} \, \text{N m} \)
  • D. \( 1.5 \times 10^{-3} \, \text{N m} \)

Q2. An infinite line charge has \( \lambda = 5 \times 10^{-7} \, \text{C/m} \). What is the electric field at 10 cm?

  • A. \( 7.5 \times 10^4 \, \text{N/C} \)
  • B. \( 8.0 \times 10^4 \, \text{N/C} \)
  • C. \( 8.5 \times 10^4 \, \text{N/C} \)
  • D. \( 9.0 \times 10^4 \, \text{N/C} \)

Q3. Two charges \( +6 \, \mu\text{C} \) and \( -4 \, \mu\text{C} \) are 25 cm apart. What is the distance from \( +6 \, \mu\text{C} \) where the electric field is zero?

  • A. 10 cm
  • B. 12 cm
  • C. 13 cm
  • D. 15 cm

Q4. A uniform electric field \( E = 4 \times 10^3 \, \text{N/C} \) is along the x-axis. What is the flux through a square of side 70 cm in the yz-plane?

  • A. \( 1960 \, \text{Nm}^2/\text{C} \)
  • B. \( 2000 \, \text{Nm}^2/\text{C} \)
  • C. \( 2100 \, \text{Nm}^2/\text{C} \)
  • D. \( 2200 \, \text{Nm}^2/\text{C} \)

Q5. Which property of electric field lines ensures they never intersect, even in complex charge distributions?

  • A. Uniqueness of direction
  • B. Continuous nature
  • C. Density variation
  • D. Symmetry

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