12th Physics notes | Electric Dipole

12th Physics notes | Electric Dipole | CBSE NCERT Solutions

12th Physics notes : We provide physics and other subjects in Hindi also. We have the best of everything assembled together to produce best results. You can also view our CBSE NCERT solutions to enhance your chances of scoring good marks in exams.

Question: What happens when an electric dipole is placed in a non-uniform electric field?

Ans: When an electric dipole is placed in a non-uniform electric field, the dipole will have both rotational and translational motion. When the dipole becomes parallel to the electric field, the rotational motion will stop.

Question: An electric dipole consists of a positive and negative charge of 4µC each placed at a distance of 5mm.Calculate dipole moment.

Ans:

q = ±4µC = ±4 × 10-6C

p = q x 2a

2a = 5mm = 5 × 10-3 m

= 4 × 10-6 × 5 × 10-3

= 2 × 10-8 C- m

Download previous year question paper of CBSE class 12 physics

Electric Dipole: A system containing two equal and opposite charges separated by a finite distance is called an electric dipole.

Electric Dipole moment: Electric dipole moment is defined as the product of magnitude of one of the charges and length of the dipole say ‘2a’ i.e.

The electric dipole moment is a vector quantity.
It is directed from – q to + q i.e.from negative charge to the positive charge.
SI unit of electric dipole moment isCoulomb- meter (Cm).
The net charge on an electric dipole is zero.

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