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Karnataka PUC II Science Electrostatic Potential Capacitance — practice questions

Explore 14 free Electrostatic Potential Capacitance questions in Karnataka PUC II Science Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Electrostatic Potential Capacitance questions and exercises with answers

Showing questions 1–14 of 14.

The electric potential V at a distance r from a point charge Q in vacuum is given byRead the answer and worked solution →The SI unit of electric potential is theRead the answer and worked solution →Inside a charged conductor in electrostatic equilibrium,Read the answer and worked solution →An equipotential surface is a surface on whichRead the answer and worked solution →The unit of electric dipole moment isRead the answer and worked solution →Work done in moving a test charge q between two points along ANY path in an electrostatic field depends onRead the answer and worked solution →Consider a point charge Q = 4 × 10⁻⁷ C. The electric potential at a point 9 cm from it is closest toRead the answer and worked solution →On the equatorial plane of an electric dipole, the electric potential at any point isRead the answer and worked solution →The electric potential due to a short dipole at large distances falls off with distance r asRead the answer and worked solution →If a charge q is moved through a potential difference V, the work done by the external force isRead the answer and worked solution →The relation between electric field E and potential V along a direction r isRead the answer and worked solution →A hollow charged conductor encloses an empty cavity. The electric field inside the cavity isRead the answer and worked solution →The work required to assemble a system of two point charges q₁ and q₂ separated by distance r₁₂ from rest at infinity isRead the answer and worked solution →A charge Q = 4 × 10⁻⁷ C is at the origin. The work done in bringing a small test charge q = 2 × 10⁻⁹ C from infinity to a point 9 cm away is approximatelyRead the answer and worked solution →

Worked practice questions

The electric potential V at a distance r from a point charge Q in vacuum is given by

  1. Q / (4πε₀ r²)
  2. Q / (4πε₀ r)
  3. Q² / (4πε₀ r)
  4. Q · r / (4πε₀)
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Correct answer: B. Q / (4πε₀ r)

V(r) = Q/(4πε₀r). The 1/r² form is the electric FIELD, not the potential.

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The SI unit of electric potential is the

  1. Coulomb
  2. Volt
  3. Newton per coulomb
  4. Joule
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Correct answer: B. Volt

1 volt = 1 joule per coulomb. Newton/coulomb is the SI unit of electric field, not potential coulomb is charge; joule is energy.

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Inside a charged conductor in electrostatic equilibrium,

  1. The electric field is non-zero and points outward
  2. The electric field is zero everywhere
  3. The electric field is equal to its surface field
  4. The potential is zero
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Correct answer: B. The electric field is zero everywhere

**One of the cardinal results:** inside a conductor in electrostatic equilibrium, E = 0 everywhere. Potential is constant (not necessarily zero) inside and equal to the surface value.

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