Which of the following instrument(s) is/are used to measure time?

Speedometer

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Digital clocks

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Quartz clocks

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Sun dial

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Solution

The correct options are
B Digital clocks
C Quartz clocks
D Sun dial
Digital clock is used to measure time and it generally uses the LED and shows the time digitally.
A quartz clock uses an electronic oscillator that is controlled by a quartz crystal to measure time.
Sun dial measures the change in direction and length of shadows to measure time as the Sun moves across the sky.
Speedometer is used to measure instant speed of automobiles.

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