Before using the beam balance why is the beam raised gently by raising the platform?
Before using the beam balance why is the beam raised gently by raising the platform?
The correct option is B To ensure that the pointer swings equally on both sides of the zero mark on scale
Before using the balance, the plumb line is brought just above the pointed projection by adjusting the levelling screws at the base. The beam is then raised gently by raising platform F using the lever and it is ensured that the pointer swings equally on both sides of the zero mark on scale, otherwise it is adjusted with the help of screw nuts. The beam is now lowered and the given object is placed on the left pan. The maximum approximate weight is placed on the right pan from the weight box with the help of forceps.
Then the lever is turned towards right so that the beam rises and the pointer begins to swing on either side. The side (left or right) to which the pointer moves more,
indicates less weight on that side. The standard weights are adjusted till the pointer either remains at the zero mark of scale or it swings equally on both sides of the zero mark. In this position, the total mass of weights on the right pan gives the mass of object.
Before using the balance, the plumb line is brought just above the pointed projection by adjusting the levelling screws at the base. The beam is then raised gently by raising platform F using the lever and it is ensured that the pointer swings equally on both sides of the zero mark on scale, otherwise it is adjusted with the help of screw nuts. The beam is now lowered and the given object is placed on the left pan. The maximum approximate weight is placed on the right pan from the weight box with the help of forceps.
Then the lever is turned towards right so that the beam rises and the pointer begins to swing on either side. The side (left or right) to which the pointer moves more,
indicates less weight on that side. The standard weights are adjusted till the pointer either remains at the zero mark of scale or it swings equally on both sides of the zero mark. In this position, the total mass of weights on the right pan gives the mass of object.
