The solid angle is measured in steradian., Ammeter is used to measure electric current., A digital clock displays the time directly., The frequency of vibrating crystals in quartz clock are very precise. , Analog clocks can be driven either mechanically or electonically., Electric charge is measured in coulumb., The uncertainity in measurement is called as error., The intersection of two straight lines gives us plane angle., Closeness of two or more measured values is called as accuracy., Physics is the study of nature and natural phenomena.,

Measurement

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