NEET Physics: Electrostatic Potential and Capacitance — MCQ Test 18

Q6. Two charges \( 14 \, \mu\text{C} \) and \( -6 \, \mu\text{C} \) are at \( (3, 0, 0) \) and \( (-3, 0, 0) \, \text{cm} \). What is the potential at midpoint? (Take \( \frac{1}{4 \pi \varepsilon_0} = 9 \times 10^9 \, \text{Nm}^2 \text{C}^{-2} \)).

Q7. A parallel plate capacitor has plates of area \( 0.05 \, \text{m}^2 \) and separation 0.25 mm in air. What is its capacitance? (Take \( \varepsilon_0 = 8.85 \times 10^{-12} \, \text{C}^2 \text{N}^{-1} \text{m}^{-2} \)).

Q8. A \( 3 \, \mu\text{F} \) capacitor charged to \( 200 \, \text{V} \) is connected to an uncharged \( 9 \, \mu\text{F} \) capacitor. What is the energy lost?

Q9. Two capacitors of \( 30 \, \text{pF} \) and \( 60 \, \text{pF} \) are connected in series. What is the equivalent capacitance?

Q10. An electric dipole with moment \( p = 2 \times 10^{-10} \, \text{C m} \) is at the origin, aligned along the x-axis. What is the potential at \( (0, 2, 0) \, \text{m} \)? (Take \( \frac{1}{4 \pi \varepsilon_0} = 9 \times 10^9 \, \text{Nm}^2 \text{C}^{-2} \)).

NEET Physics — Electrostatic Potential and Capacitance

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A conductor has a surface charge density of \( 4.5 \times 10^{-6} \, \text{C/m}^2 \). What is the electric field just outside it? (Take \( \varepsilon_0 = 8.85 \times 10^{-12} \, \text{C}^2 \text{N}^{-1} \text{m}^{-2} \)).

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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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Key concepts covered in this specific test include Conductor, Electric, Varepsilon, Infinity, Potential, and Uncharged.

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 conductor has a surface charge density of \( 4.5 \times 10^{-6} \, \text{C/m}^2 \). What is the electric field just outside it? (Take \( \varepsilon_0 = 8.85 \times 10^{-12} \, \text{C}^2 \text{N}^{-1} \text{m}^{-2} \)).

  • A. 4.5 × 10⁵ N/C
  • B. 5.085 × 10⁵ N/C
  • C. 5.5 × 10⁵ N/C
  • D. 6 × 10⁵ N/C

Q2. A charge of \( 2 \, \mu\text{C} \) is moved from infinity to a point with potential \( 500 \, \text{V} \). What is the work done?

  • A. 1 mJ
  • B. 2 mJ
  • C. 0.5 mJ
  • D. 1.5 mJ

Q3. A conductor has a surface charge density of \( 1.5 \times 10^{-6} \, \text{C/m}^2 \). What is the electric field just outside it? (Take \( \varepsilon_0 = 8.85 \times 10^{-12} \, \text{C}^2 \text{N}^{-1} \text{m}^{-2} \)).

  • A. 1.5 × 10⁵ N/C
  • B. 1.695 × 10⁵ N/C
  • C. 1.8 × 10⁵ N/C
  • D. 2 × 10⁵ N/C

Q4. When a charged conductor is placed in contact with an uncharged conductor of smaller size, why does the smaller conductor acquire a higher surface charge density upon reaching equilibrium?

  • A. It has a larger surface area
  • B. It stores more charge
  • C. It has a smaller radius, increasing density
  • D. It has a higher potential

Q5. In a system where a positively charged sphere is enclosed by an uncharged conducting shell, why does the outer surface of the shell acquire a negative charge if a negative charge is brought near it?

  • A. Due to the shell's dielectric properties
  • B. Due to repulsion by the external negative charge
  • C. Due to the inner sphere's positive charge
  • D. Due to grounding of the shell

+ 5 more questions in the actual test

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