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Electric dipole moment Video Lecture | Basic Physics for IIT JAM

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FAQs on Electric dipole moment Video Lecture - Basic Physics for IIT JAM

1. What is an electric dipole moment?
Ans. An electric dipole moment is a measure of the separation of positive and negative charges in an electric system. It is a vector quantity that quantifies the strength and orientation of an electric dipole.
2. How is the electric dipole moment calculated?
Ans. The electric dipole moment (p) of a system can be calculated by multiplying the magnitude of the charge (q) with the distance (d) separating the positive and negative charges, and then multiplying it by a unit vector (u) in the direction from the negative to the positive charge. Mathematically, p = qd u.
3. What are some examples of electric dipoles?
Ans. Some common examples of electric dipoles include a water molecule (H2O), where the oxygen atom is slightly negatively charged and the hydrogen atoms are slightly positively charged; a bar magnet, where the north and south poles act as positive and negative charges, respectively; and a capacitor, where positive and negative charges accumulate on its plates.
4. How does an electric dipole interact with an electric field?
Ans. An electric dipole experiences a torque when placed in an electric field. The torque causes the dipole to align itself with the electric field, with the positive charge aligning towards the lower potential and the negative charge aligning towards the higher potential. This alignment is known as the dipole moment aligning with the electric field lines.
5. What are some real-life applications of electric dipoles?
Ans. Electric dipoles have various applications in everyday life and technology. Some examples include the operation of electric motors, where the interaction between an electric field and a rotating dipole generates mechanical motion; the functioning of antennas, which rely on the radiation of electromagnetic waves by oscillating electric dipoles; and the measurement of molecular structures and properties through techniques like nuclear magnetic resonance (NMR) spectroscopy.
210 videos|156 docs|94 tests
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