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3 - Phys102 Lecture 3 Phys102 Lecture 3 1 Electric Dipoles...

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Phys102 Lecture 3 Electric Dipoles Key Points Electric dipole Applications in life sciences References SFU Ed: 21-5,6,7,8,9,10,11,12,+. 6 th Ed: 16-5,6,7,8,9,11,+. Phys102 Lecture 3 - 1
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21-11 Electric Dipoles An electric dipole consists of two charges Q , equal in magnitude and opposite in sign, separated by a distance . The dipole moment, p = Q , points from the negative to the positive charge. p
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An electric dipole in a uniform electric field will experience no net force, but it will, in general, experience a torque:
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The electric field created by a dipole is the sum of the fields created by the two charges; far from the dipole, the field shows a 1/ r 3 dependence:
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In a carbon monoxide molecule, the electron density near the carbon atom is greater than that near the oxygen, which result in a dipole moment. Electric dipole moment of a CO molecule Phys101 Lecture 3 - 5 p
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i-clicker question 3-1 Phys101 Lecture 3 - 6 Does a carbon dioxide molecule carry an electric dipole moment?
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