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प्रश्न
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उत्तर
Precautions to be taken to measure the mass of a body using beam balance are
(a). The beam must be gently lowered before adding or removing weights from the pan.
(b). The weights should not be carried with bare hands to avoid the change in weights due to moisture and dust particles from the surrounding.
(c). The lever should be turned gently, in order to prevent knife-edges from chipping.
(d). Never keep the wet or hot objects on the pan.
(e). The weights should be placed into the weight box after use.
(f). Whenever you are near the actual weight, you should carefully try the weights in the descending order.
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