NEET Physics: Electrostatic Potential and Capacitance — MCQ Test 14

Q6. A parallel plate capacitor has plates of area \( 0.05 \, \text{m}^2 \) separated by 1 mm in air. What is its capacitance? (Take \( \varepsilon_0 = 8.85 \times 10^{-12} \, \text{C}^2 \text{N}^{-1} \text{m}^{-2} \)).

Q7. In an electrostatic shielding scenario, a cavity inside a conductor contains a charge. What can be said about the electric field outside the conductor?

Q8. Two charges \( 18 \, \mu\text{C} \) and \( -6 \, \mu\text{C} \) are placed 18 cm apart. What is the potential energy of the system? (Take \( \frac{1}{4 \pi \varepsilon_0} = 9 \times 10^9 \, \text{Nm}^2 \text{C}^{-2} \)).

Q9. A charged particle is placed in a region where the electric potential is constant everywhere. What can be inferred about the motion of the particle if it is released from rest?

Q10. A dipole with \( p = 3 \times 10^{-9} \, \text{C m} \) makes an angle of \( 60^\circ \) with a uniform field \( E = 2 \times 10^5 \, \text{N/C} \). What is its potential energy?

NEET Physics — Electrostatic Potential and Capacitance

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A parallel plate capacitor with capacitance \( 50 \, \text{pF} \) has a dielectric (\( K = 2 \), thickness \( d/3 \)) inserted. What is the new capacitance? (Original separation \( d \)).

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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 Parallel, Capacitor, Capacitance, Dielectric, Thickness, and Inserted.

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 parallel plate capacitor with capacitance \( 50 \, \text{pF} \) has a dielectric (\( K = 2 \), thickness \( d/3 \)) inserted. What is the new capacitance? (Original separation \( d \)).

  • A. 55 pF
  • B. 58 pF
  • C. 62 pF
  • D. 60 pF

Q2. Why does the electric field inside a conductor vanish in electrostatic equilibrium, even if the conductor is irregularly shaped?

  • A. Charges redistribute to cancel the internal field
  • B. The shape prevents field penetration
  • C. The conductor absorbs the external field
  • D. The field accumulates on the surface only

Q3. Two charges \( 20 \, \mu\text{C} \) and \( -10 \, \mu\text{C} \) are at \( (1, 0, 0) \) and \( (-1, 0, 0) \, \text{cm} \). What is the potential at midpoint? (Take \( \frac{1}{4 \pi \varepsilon_0} = 9 \times 10^9 \, \text{Nm}^2 \text{C}^{-2} \)).

  • A. 8.5 × 10⁶ V
  • B. 8.8 × 10⁶ V
  • C. 9.2 × 10⁶ V
  • D. 9 × 10⁶ V

Q4. A parallel plate capacitor with capacitance \( 150 \, \text{pF} \) has a dielectric (\( K = 6 \), thickness \( d/5 \)) inserted. What is the new capacitance? (Original separation \( d \)).

  • A. 170 pF
  • B. 175 pF
  • C. 185 pF
  • D. 180 pF

Q5. A dipole \( p = 4 \times 10^{-10} \, \text{C m} \) is in a uniform field \( E = 10^5 \, \text{N/C} \) at \( 60^\circ \). What is its potential energy?

  • A. -1 × 10⁻⁵ J
  • B. -2 × 10⁻⁵ J
  • C. -3 × 10⁻⁵ J
  • D. -4 × 10⁻⁵ J

+ 5 more questions in the actual test

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