The data written in flip-flop remains stored as long as __________a.A.C. power is removedb.D.C. power is removedc.D.C. power is supplied

The data written in a flip-flop remains stored as long as D.C. power is supplied. Flip-flops are bistable devices, meaning they have two stable states and can hold one bit of data. They require a constant power supply to maintain their state.

If D.C. power is removed (options a and b), the flip-flop will lose the stored data because it requires electricity to sustain the charge that represents its state. In digital circuits, this characteristic allows flip-flops to serve as memory elements in storage devices and registers, ensuring that data remains intact and retrievable as long as the necessary power is maintained. Thus, the correct answer is option:

c. D.C. power is supplied.