Define near field communication (NFC) and explain how it is used for NFC-enabled credit cards and other devices that would otherwise need batteries.
What will be an ideal response?
Near field communication (NFC) is a low-speed, short-range technology designed for (among other things) small-value monetary transactions. Most NFC connections consist of an NFC tag that stores private data and some kind of NFC reader. The NFC tag is an unpowered, passive device. Bringing the NFC reader in very close proximity to the NFC tag creates an electromagnetic induction in the NFC tag, enabling the two devices to communicate using only power from the reader. This is very handy for NFC-enabled credit cards and other devices that would otherwise need batteries.
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