Tamil Nadu Board of Secondary EducationHSC Science Class 12th

# Give the expression for the magnitude of its electric dipole moment and the direction. - Physics

Short Note

Give the expression for the magnitude of its electric dipole moment and the direction.

#### Solution

1. The magnitude of the dipole moment is given by the product of the magnitude of one of the charges and the distance between them.
|vec "P"| = 2qa
vec "P" = "qr"_+ + (- "q") vec "r"_-
where r̂+ is the position of vector of +1 from the origin and r̂ is the position vector of -q from the origin
vec "P" = "qai" - "qa"(- hat"i") = 2 "qai"
2. It is a vector quantity having direction along the dipole axis -q to +q.
3. Unit: coulomb metre (Cm).
Concept: Electric Dipole and Its Properties
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#### APPEARS IN

Tamil Nadu Board Samacheer Kalvi Class 12th Physics Volume 1 and 2 Answers Guide
Chapter 1 Electrostatics
Evaluation | Q II. 8. | Page 73
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