NEET > Physics Class 12 > Electric Field due to a Dipole
Electric Field due to a Dipole Video Lecture - Physics Class 12 - NEET
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FAQs on Electric Field due to a Dipole Video Lecture - Physics Class 12 - NEET
| 1. What is an electric dipole? |  |
Ans. An electric dipole is a pair of equal and opposite charges separated by a small distance. It can be considered as a system of two charges, one positive and one negative.
| 2. How does an electric dipole create an electric field? | |
Ans. An electric dipole creates an electric field around it due to the combination of the electric fields produced by the positive and negative charges. The field lines originate from the positive charge and terminate on the negative charge.
| 3. How is the electric field due to a dipole calculated? | |
Ans. The electric field due to a dipole at any point in space can be calculated using the formula:
E = (1 / 4πε₀) * [(2p / r³) + (p / r²)]
where E is the electric field, p is the magnitude of the dipole moment, r is the distance from the dipole, and ε₀ is the permittivity of free space.
| 4. What is the direction of the electric field due to a dipole? | |
Ans. The electric field due to a dipole is a vector quantity. At points along the axial line (passing through the center of the dipole and perpendicular to the dipole axis), the electric field is directed away from the positive charge towards the negative charge. Along the equatorial line (perpendicular to the dipole axis but not passing through the center), the field is directed opposite to the axial direction.
| 5. How does the strength of the electric field due to a dipole change with distance? | |
Ans. The strength of the electric field due to a dipole decreases with increasing distance from the dipole. The field follows an inverse square law, meaning that it decreases as the inverse square of the distance. Thus, the electric field is stronger closer to the dipole and weaker farther away from it.
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154 videos|444 docs|185 tests
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Timeline
| 00:00 | Introduction |
| 00:19 | Derivation of Electric Field Due to a Dipole at an axial point |
| 08:01 | Discussion on the Formula Derived |
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