NEET Physics: Electrostatic Potential and Capacitance — MCQ Test 22

Q6. Three charges \( +11 \, \mu\text{C} \), \( -8 \, \mu\text{C} \), and \( +6 \, \mu\text{C} \) are at \( (0, 0, 0) \), \( (11, 0, 0) \), and \( (0, 11, 0) \, \text{m} \). What is the potential at \( (11, 11, 0) \, \text{m} \)? (Take \( \frac{1}{4 \pi \varepsilon_0} = 9 \times 10^9 \, \text{Nm}^2 \text{C}^{-2} \)).

Q7. Three capacitors \( 5 \, \text{pF} \), \( 10 \, \text{pF} \), and \( 20 \, \text{pF} \) are in parallel. What is the total capacitance?

Q8. A point charge \( Q = 9 \times 10^{-9} \, \text{C} \) is placed at the origin. Calculate the potential at a point 3 m away from the charge. (Take \( \frac{1}{4 \pi \varepsilon_0} = 9 \times 10^9 \, \text{Nm}^2 \text{C}^{-2} \)).

Q9. A parallel plate capacitor with \( C = 70 \, \text{pF} \) in air has a dielectric (\( K = 5 \)) inserted fully between plates. What is the new capacitance?

Q10. A dipole with \( p = 4 \times 10^{-9} \, \text{C m} \) makes an angle of \( 30^\circ \) with a uniform field \( E = 5 \times 10^4 \, \text{N/C} \). What is its potential energy?

NEET Physics — Electrostatic Potential and Capacitance

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A dielectric slab is partially inserted between the plates of a parallel plate capacitor while maintaining a constant voltage across the plates. What happens to the electric field between the plates in the region where the dielectric is present?

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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 Dielectric, Partially, Inserted, Parallel, Capacitor, and Maintaining.

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 dielectric slab is partially inserted between the plates of a parallel plate capacitor while maintaining a constant voltage across the plates. What happens to the electric field between the plates in the region where the dielectric is present?

  • A. It decreases due to the dielectric's polarization
  • B. It increases due to increased charge on the plates
  • C. It remains unchanged due to constant voltage
  • D. It becomes zero inside the dielectric

Q2. In a system of two identical conductors initially charged differently and then connected by a wire, why does the final energy of the system decrease?

  • A. The conductors lose charge to ground
  • B. The potentials become unequal
  • C. The capacitance increases
  • D. Energy is lost during charge redistribution

Q3. A point charge \( Q = 18 \times 10^{-9} \, \text{C} \) is placed at the origin. Calculate the potential at a point 6 m away from the charge. (Take \( \frac{1}{4 \pi \varepsilon_0} = 9 \times 10^9 \, \text{Nm}^2 \text{C}^{-2} \)).

  • A. 27 V
  • B. 30 V
  • C. 24 V
  • D. 20 V

Q4. Five capacitors of \( 20 \, \mu\text{F} \) each are in series. What is the equivalent capacitance?

  • A. 3 µF
  • B. 5 µF
  • C. 2 µF
  • D. 4 µF

Q5. A dipole \( p = 2 \times 10^{-9} \, \text{C m} \) is rotated from \( \theta = 90^\circ \) to \( 0^\circ \) in a field \( E = 5 \times 10^5 \, \text{N/C} \). What is the work done?

  • A. 0 J
  • B. 1 × 10⁻³ J
  • C. 2 × 10⁻³ J
  • D. -1 × 10⁻³ J

+ 5 more questions in the actual test

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