Is one hour enough to from Terminal A to terminal B at Newark (EWR)?

I am traveling from Orlando (MCO) to Hyderabad, India. The booking consists of one ticket from Orlando to Newark (EWR), and the other from Newark to India.

I have to change from the terminal A to terminal B at EWR, will 50 minutes be enough to do this?

Do I have to collect baggage and recheck-in at EWR? Is there any immigration and custom procedure while exiting the US?

I am a citizen of India.