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Indian Navy SSR Electrostatic Potential and Capacitance — practice questions

Explore 3 free Electrostatic Potential and Capacitance questions in Indian Navy SSR Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Electrostatic Potential and Capacitance questions and exercises with answers

Showing questions 1–3 of 3.

An electric dipole of moment p is placed in a uniform field E. The work done to rotate it from the orientation θ = 0 (aligned with the field) to θ = 180° isRead the answer and worked solution →Match each electrostatic termRead the answer and worked solution →True or false: electrostaticsRead the answer and worked solution →

Worked practice questions

An electric dipole of moment p is placed in a uniform field E. The work done to rotate it from the orientation θ = 0 (aligned with the field) to θ = 180° is

  1. 2pE
  2. 0
  3. −2pE
  4. pE
Show answer and solution

Correct answer: A. 2pE

1. PE in a uniform field: U(θ) = −p·E = −pE cos θ. 2. W = ΔU = U(180°) − U(0°) = (+pE) − (−pE) = 2pE. 3. The dipole goes from the most stable to the least stable orientation; work is positive on the system. _Source: syllabus Physics Part I, Ch 2 §2.8.3_

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Match each electrostatic term

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Matching pairs
  1. Left
    Potential
    Right
    Work to bring unit charge from infinity
  2. Left
    Potential energy
    Right
    Energy a charge has due to its position
  3. Left
    Equipotential
    Right
    A surface where the potential is constant
  4. Left
    Capacitance
    Right
    Charge stored per unit potential difference
Instructions
Tap a term on the left, then tap what it means.
_Source: syllabus Physics Electrostatic Potential and Capacitance, electrostatic potential_

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True or false: electrostatics

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Questions
  1. Statement is true
    Yes
    Statement
    Potential at a point is the work done bringing unit charge from infinity.
  2. Statement is true
    Yes
    Statement
    No work is done moving a charge along an equipotential surface.
  3. Statement is true
    No
    Statement
    Electrostatic potential is a vector quantity.
  4. Statement is true
    Yes
    Statement
    A charge in a field has electrostatic potential energy.
Instructions
Decide whether each statement is true or false.
_Source: syllabus Physics Electrostatic Potential and Capacitance, electrostatic potential_

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