Nobody can work in the visa on a visitor visa. Short duration courses like cookery class that will not add any credits to a course can be attended using a visitor visa. But working in the US, that will enable you to draw salary is not allowed on a visitor visa.
You can only work in the US if you have a work permit which you would have to apply for at immigration. unless you are here on a student visa.
Yes, you can work in the US with a visa.
No, unless you already have a valid U.S. entry visa.
No, you cannot work in the US with a tourist visa.
Work visa can be got through employers only. Either company in US should recruit you and apply for your work visa or company in your home country also can send you to work in US on a work visa. Depending on the requirement and your eligibility you will be issued a visa with which you get authorization to work in US.
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.
Work visa can be got through employers only. Either company in US should recruit you and apply for your work visa or company in your home country also can send you to work in US on a work visa. Depending on the requirement and your eligibility you will be issued a visa with which you get authorization to work in US.
No, someone with a tourist visa is not allowed to work in the US.
No, you cannot work for a US company from India without a visa.
No, US citizens cannot work in the UK without a visa.
If you are a Canadian citizen and your spouse is a TN visa holder, you may be eligible to apply for a TD visa, which allows you to enter and stay in the US as a dependent of your spouse. However, the TD visa does not grant you authorization to work in the US. If you want to work in the US, you would need to separately apply for a work visa that suits your qualifications and employment situation, such as an H-1B visa or an L-1 visa.
Work visa