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An electric dipole consists of two opposite charges of magnitude +- q seperated by 2a. When the dipole is placed in uniform electric field E, to have minimum potential energy, then dipole moment p makes which the following angle with E
- a)180o
- b)90o
- c)60o
- d)0o
Correct answer is option 'D'. Can you explain this answer?
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An electric dipole consists of two opposite charges of magnitude +-q s...
Electric Dipole in Uniform Electric Field
- An electric dipole consists of two opposite charges of magnitude -q separated by a distance 2a.
- The dipole moment p is defined as the product of the magnitude of either charge and the distance between them.
- The dipole moment vector points from the negative charge to the positive charge.
- When an electric dipole is placed in a uniform electric field E, it experiences a torque which tends to align the dipole moment with the electric field.
- The dipole moment vector makes an angle θ with the electric field vector.
Minimum Potential Energy
- When an electric dipole is placed in an external electric field, it experiences a torque which tends to align the dipole moment with the electric field.
- The potential energy of an electric dipole in an external electric field is given by U = -pEcosθ, where θ is the angle between the dipole moment and the electric field.
- The potential energy is minimum when the dipole moment is aligned with the electric field, i.e., θ = 0o.
Answer
- In the given problem, the electric dipole is placed in a uniform electric field E.
- To have minimum potential energy, the dipole moment must be aligned with the electric field, i.e., θ = 0o.
- Therefore, the correct answer is option 'D', i.e., 0o.
- An electric dipole consists of two opposite charges of magnitude -q separated by a distance 2a.
- The dipole moment p is defined as the product of the magnitude of either charge and the distance between them.
- The dipole moment vector points from the negative charge to the positive charge.
- When an electric dipole is placed in a uniform electric field E, it experiences a torque which tends to align the dipole moment with the electric field.
- The dipole moment vector makes an angle θ with the electric field vector.
Minimum Potential Energy
- When an electric dipole is placed in an external electric field, it experiences a torque which tends to align the dipole moment with the electric field.
- The potential energy of an electric dipole in an external electric field is given by U = -pEcosθ, where θ is the angle between the dipole moment and the electric field.
- The potential energy is minimum when the dipole moment is aligned with the electric field, i.e., θ = 0o.
Answer
- In the given problem, the electric dipole is placed in a uniform electric field E.
- To have minimum potential energy, the dipole moment must be aligned with the electric field, i.e., θ = 0o.
- Therefore, the correct answer is option 'D', i.e., 0o.
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An electric dipole consists of two opposite charges of magnitude +-q seperated by 2a. When the dipole is placed in uniform electric field E, to have minimum potential energy, then dipole moment p makes which the following angle with Ea)180ob)90oc)60od)0oCorrect answer is option 'D'. Can you explain this answer?
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An electric dipole consists of two opposite charges of magnitude +-q seperated by 2a. When the dipole is placed in uniform electric field E, to have minimum potential energy, then dipole moment p makes which the following angle with Ea)180ob)90oc)60od)0oCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for An electric dipole consists of two opposite charges of magnitude +-q seperated by 2a. When the dipole is placed in uniform electric field E, to have minimum potential energy, then dipole moment p makes which the following angle with Ea)180ob)90oc)60od)0oCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of An electric dipole consists of two opposite charges of magnitude +-q seperated by 2a. When the dipole is placed in uniform electric field E, to have minimum potential energy, then dipole moment p makes which the following angle with Ea)180ob)90oc)60od)0oCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
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