If you have multiple Google+ accounts, you can easily switch from one to another or you can now even merge 2 accounts into one.
When you have multiple Google accounts, it is not necessary to reconnect continuously from one to another, or to switch to new browsers to open new account. There is a very simpler solution.
Connect with a Google account first. In the Toolbar, click on your profile icon. Click Add Account on the menu. On the next page, fill in the e-mail address and password of your other account and then confirm with the options given. Click again on your profile icon. Now you will be able to see the two (or more) account, which will be displayed to you. Just click on one of them to switch. How to Merge two Google+ accounts
If you choose to create a new account on Google+, you can retrieve all your contacts, all your circles, and the people and the pages you've blocked or ignored. Warning, however, this is not a simple copy procedure: your original account will be overwritten by the new.
Anyways, to do so, log on to Google page Takeout from here
and click on Transfer your Google+ connections to another account
as shown in the below image. The transfer starts 7 days after the request, and it will probably take 48 hours. The problem is that during this week your use of Google+ will be very limited, that is; not for content publishing, no addition of contact, or the ability to block a person or a page.