There are two types of Power of Attorney (PoA) in India
Specific or Limited Power of Attorney
Limited PoA could give authority to someone for a limited purpose. This type of PoA makes for any specific purpose and usually ends at a time specified in the PoA document. While giving PoA to your stock broker, please make sure your broker is registered with SEBI.
General Power of Attorney (PoA)
General Power of Attorney authorizes the person to perform all general activities on the behalf of the original holder.