NEET Physics: Electrostatic Potential and Capacitance — MCQ Test 16

Q6. Three charges \( +9 \, \mu\text{C} \), \( -6 \, \mu\text{C} \), and \( +4 \, \mu\text{C} \) are at \( (0, 0, 0) \), \( (9, 0, 0) \), and \( (0, 9, 0) \, \text{m} \). What is the potential at \( (9, 9, 0) \, \text{m} \)? (Take \( \frac{1}{4 \pi \varepsilon_0} = 9 \times 10^9 \, \text{Nm}^2 \text{C}^{-2} \)).

Q7. A charge of \( 5 \, \mu\text{C} \) is moved from infinity to a point where the potential is \( 300 \, \text{V} \). What is the work done?

Q8. A conductor has a surface charge density of \( 5.5 \times 10^{-6} \, \text{C/m}^2 \). What is the electric field just outside it? (Take \( \varepsilon_0 = 8.85 \times 10^{-12} \, \text{C}^2 \text{N}^{-1} \text{m}^{-2} \)).

Q9. A point charge \( Q = 15 \times 10^{-9} \, \text{C} \) is placed at the origin. Calculate the potential at a point 5 m away from the charge. (Take \( \frac{1}{4 \pi \varepsilon_0} = 9 \times 10^9 \, \text{Nm}^2 \text{C}^{-2} \)).

Q10. A dipole \( p = 7 \times 10^{-9} \, \text{C m} \) is rotated from \( \theta = 90^\circ \) to \( 0^\circ \) in a field \( E = 2 \times 10^5 \, \text{N/C} \). What is the work done?

NEET Physics — Electrostatic Potential and Capacitance

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A charge of \( 3 \, \mu\text{C} \) is brought from infinity to a point where the potential is \( 400 \, \text{V} \). What is the work done?

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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 Electrostatic Potential and Capacitance. 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 Infinity, Potential, Varepsilon, Capacitor, Parallel, and Dielectric.

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 charge of \( 3 \, \mu\text{C} \) is brought from infinity to a point where the potential is \( 400 \, \text{V} \). What is the work done?

  • A. 1.2 mJ
  • B. 1.5 mJ
  • C. 1 mJ
  • D. 2 mJ

Q2. Three charges \( +3 \, \mu\text{C} \), \( -2 \, \mu\text{C} \), and \( +4 \, \mu\text{C} \) are at \( (0, 0, 0) \), \( (3, 0, 0) \), and \( (0, 4, 0) \, \text{m} \). What is the potential at \( (3, 4, 0) \, \text{m} \)? (Take \( \frac{1}{4 \pi \varepsilon_0} = 9 \times 10^9 \, \text{Nm}^2 \text{C}^{-2} \)).

  • A. 12000 V
  • B. 12870 V
  • C. 13000 V
  • D. 14000 V

Q3. A \( 3 \, \mu\text{F} \) capacitor is charged to \( 300 \, \text{V} \). What is the energy stored in it?

  • A. 0.1 J
  • B. 0.15 J
  • C. 0.135 J
  • D. 0.2 J

Q4. A charge of \( 6 \, \mu\text{C} \) is moved from infinity to a point where the potential is \( 150 \, \text{V} \). What is the work done?

  • A. 0.9 mJ
  • B. 1 mJ
  • C. 0.8 mJ
  • D. 1.2 mJ

Q5. A parallel plate capacitor with \( C = 40 \, \text{pF} \) in air has a dielectric (\( K = 5 \)) inserted fully between plates. What is the new capacitance?

  • A. 160 pF
  • B. 200 pF
  • C. 240 pF
  • D. 280 pF

+ 5 more questions in the actual test

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