While in the US. if one is traveling to the US. primarily for tourism but they want to take a short course of study that is recreational and not for credit towards a degree, and the course is less than 18 hours per week, then this is allowed on a B2 visa. For example if one is taking a vacation to the US, and during that time they wish to take a two-day cooking class for their enjoyment, and no credit is earned, then this would be permitted on a B2 visa. But when you are in the US on a tourist visa you can not work.
Basically you need to have a sponsor or an employer in order for you to have it converted and for you to be able to use it to work legally. First step is to find an employer and then the company will be the one to help you and process your visa conversion.
You don't.
not legally, you need a work visa
Yes, unless you are already a US citizen you will need an immigrant visa that permits you to work, not a tourist visa.
A US citizen can remain in the UK for 6 months on a tourist visa, however not allowed to work.
The best thing to do is to apply for a B2 tourist visa before your H2B expires. That way, you do not need to leave the country before starting your tour of the US. Technically, you can leave and apply for a tourist visa in the Caribbean. Realistically, if your application is denied you will not be stuck in the Caribbean and unable to return to the US.
You can work, only if you have obtained the particular visa that entitles you to work. For example, you cannot work on tourist visa in the US. It permits you to stay in the US only for a temporary period of time. You need to get H-1 B or other employment specific visas in order to work.
No US citizen does. No legal resident does. Only non-resident aliens on student visa, tourist visa, or visitor visa need work permits.
No.
A US tourist visa is needed to visit the US as a tourist. If merely changing planes in Japan, a Japanese visa is not required.
No. You need to apply for a separate US Visa.
US citizens don't need visas to enter the US, so it doesn't matter what kind of Indian visa you have. The Indian visa is permission to enter India.
Yes, to enter US visa is a must. Depending on the purpose of your visit the category differs from A to Z. For example B-1 is work visa, B-2 is tourist visa, F-1 is student visa etc.