Question

4. A special type of clock used to control the sequence of an event or process, is (a) clock having quartz crystal (c) timer (b) stop watch (d) none of these​

Answer 1

Answer:

Timer

Explanation:

Answer 2

Answer:

(a) clock having quartz crystal

Explanation:

Quartz clocks and quartz watches are timepieces that use an electronic oscillator regulated by a quartz crystal to keep time. This crystal oscillator creates a signal with very precise frequency, so that quartz clocks and watches are at least an order of magnitude more accurate than mechanical clocks. Generally, some form of digital logic counts the cycles of this signal and provides a numerical time display, usually in units of hours, minutes, and seconds.

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