NEET Physics: Electrostatic Potential and Capacitance — MCQ Test 12

Q6. Why does the electric field between two large parallel plates with opposite charges remain uniform even if one plate has a dielectric coating on its inner surface?

Q7. Why does the electric field inside a dielectric material decrease when placed in an external field, compared to the field in free space?

Q8. A dipole with \( p = 6 \times 10^{-9} \, \text{C m} \) makes an angle of \( 45^\circ \) with a uniform field \( E = 2 \times 10^5 \, \text{N/C} \). What is its potential energy?

Q9. A conductor has a surface charge density of \( 1 \times 10^{-6} \, \text{C/m}^2 \). What is the electric field just outside it? (Take \( \varepsilon_0 = 8.85 \times 10^{-12} \, \text{C}^2 \text{N}^{-1} \text{m}^{-2} \)).

Q10. A \( 2 \, \mu\text{F} \) capacitor is charged to \( 500 \, \text{V} \). What is the energy stored in it?

NEET Physics — Electrostatic Potential and Capacitance

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A spherical conductor of radius 4 cm has a charge of \( 4 \times 10^{-8} \, \text{C} \). What is the potential at its surface? (Take \( \frac{1}{4 \pi \varepsilon_0} = 9 \times 10^9 \, \text{Nm}^2 \text{C}^{-2} \)).

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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 Spherical, Conductor, Potential, Varepsilon, Electric, and Parallel.

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 spherical conductor of radius 4 cm has a charge of \( 4 \times 10^{-8} \, \text{C} \). What is the potential at its surface? (Take \( \frac{1}{4 \pi \varepsilon_0} = 9 \times 10^9 \, \text{Nm}^2 \text{C}^{-2} \)).

  • A. 9000 V
  • B. 8000 V
  • C. 10000 V
  • D. 12000 V

Q2. A conductor has a surface charge density of \( 3.5 \times 10^{-6} \, \text{C/m}^2 \). 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. 3.5 × 10⁵ N/C
  • B. 3.955 × 10⁵ N/C
  • C. 4 × 10⁵ N/C
  • D. 4.5 × 10⁵ N/C

Q3. In a charged parallel plate capacitor, why does the electric field remain uniform between the plates even when a dielectric slab is partially inserted?

  • A. Due to increased charge on the plates
  • B. Due to the dielectric's non-uniform polarization
  • C. Due to the geometry of parallel plates
  • D. Due to the dielectric's high conductivity

Q4. A charged particle moves along a path between two points in an electric field where the potential difference is zero. What can be inferred about the path taken?

  • A. The path is a straight line
  • B. The path is circular
  • C. The path lies on an equipotential surface
  • D. The path is parallel to the field lines

Q5. Why does the electric field just outside a charged conductor depend only on the surface charge density and not on the total charge of the conductor?

  • A. It is determined by the local surface charge density
  • B. The total charge cancels out at the surface
  • C. The field inside the conductor shields the total charge
  • D. The conductor's shape alters the field distribution

+ 5 more questions in the actual test

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