# An electric dipole is formed by two particles fixed at the end of a light rod of length L. Mass m and 2m with charge q and - q. The system is placed in such a way that the dipole axis is parallel to a uniform electric field. If the dipole is slightly rotated about its center then show that for small angular displacement it's an shm. And find time period

### Asked by arushidabhade | 5th May, 2020, 09:16: AM

Expert Answer:

###
Dipole moment **p** is given by **p** = q**d **.
If this dipole is placed in electric field, it experiences a torque **τ** = **p** x **E**

**p**is given by

**p**= q

**d**.

**τ**=

**p**x

**E**

### Answered by Shiwani Sawant | 5th May, 2020, 12:37: PM

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