Electrical & Electronics Engineering Questions Pdf - 2

The microprocessor has no ROM, RAM and no I/O ports on the chip itself. Whereas the microcontroller has a CPU in addition to a fixed amount of RAM, RO, I/O ports and a timer all on a single chip.

Reverse Power flow relay are used in generating station’s protection. A generating stations is supposed to fed power to the grid and in case generating units are off, there is no generation in the plant then plant may take power from grid. To stop the flow of power from grid to generator we us reverse power relay.

Yes, volt is the unit of energy. It is because volt is the unit of electric potential.

Electric potential, V = Work done / Q = W/Q

Therefore, the unit of electric potential is joules/C. Now, Joules/C is named as volt.

When scr is conducting current in forward conduction state, scr will return to forward blocking state when the anode current or forward current falls below a low level called Holding current.