Electric Field and Electric Dipole in Physics Class XII
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Questions and Answers

In a dipole, when the net force is zero due to an electric field and the center of mass remains fixed, what produces a net torque?

  • The electric field strength
  • The position of the dipole
  • The uniformity of the electric field
  • The forces on the charged ends (correct)
  • What is the condition for a dipole to exist in an unstable equilibrium state?

  • When the dipole moment is zero
  • When the angle between charges is 0° or 360°
  • When the net force is zero
  • When the angle between charges is 180° (correct)
  • What is the minimum potential energy of a dipole in an uniform electric field?

  • When the angle between charges is 180°
  • For unstable equilibrium
  • When the dipole moment is minimum
  • For stable equilibrium (correct)
  • Which factor determines the strength of the torque experienced by a dipole in an electric field?

    <p>Orientation of the dipole</p> Signup and view all the answers

    What happens to a dipole in a non-uniform electric field?

    <p>It experiences both rotary and translatory motion</p> Signup and view all the answers

    What does the dipole moment equation p = q × 2a represent?

    <p>Distance between charges in a dipole</p> Signup and view all the answers

    What happens when a nucleus of lower binding energy is converted into higher binding energy?

    <p>Energy is released</p> Signup and view all the answers

    What is the process known as when a heavy nucleus is broken into two lighter nuclei with the release of energy?

    <p>Fission</p> Signup and view all the answers

    Which force is much stronger than the Coulomb force but acts over a short range within the nucleus?

    <p>Nuclear force</p> Signup and view all the answers

    What does the nuclear force do with respect to protons and neutrons in the tiny nuclear volume?

    <p>Attracts them together</p> Signup and view all the answers

    In the process of fusion, what happens when two light nuclei are joined to form one nucleus of higher binding energy?

    <p>Energy is released</p> Signup and view all the answers

    What happens to the binding energy per nucleon when a nucleus of lower binding energy is converted into higher binding energy?

    <p>Increases</p> Signup and view all the answers

    What is the concept behind the torque experienced by an electric dipole in an electric field?

    <p>It tends to align the dipole along the field direction</p> Signup and view all the answers

    What happens to the torque experienced by an electric dipole when it is aligned parallel to the electric field lines?

    <p>It decreases to zero</p> Signup and view all the answers

    How does the torque on an electric dipole change if the magnitude of the electric field is increased?

    <p>Torque increases</p> Signup and view all the answers

    What effect does decreasing the angle between the dipole moment and electric field have on the torque experienced by the dipole?

    <p>Torque increases</p> Signup and view all the answers

    In which orientation will an electric dipole experience no net torque in a uniform electric field?

    <p>Aligned perpendicular to the field lines</p> Signup and view all the answers

    If an electric dipole is in equilibrium in a non-uniform electric field, what can be said about its torque?

    <p>Torque is zero</p> Signup and view all the answers

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