Give information of the following
1)Screw gauge
2)Vernier callipers
3)Spherometer
4)Physical Balance
5)Stop watch
Give at least 10 points of each point.
Answers
Vernier Calipers: The Vernier Caliper is a precision instrument that can be used to measure internal and external distances extremely accurately :
Spherometer:A spherometer is an instrument for the precise measurement of the radius of a sphere. Originally, these instruments were primarily used by opticians to measure the curvature of the surface of a lens.
physical balance : In simple terms a physical balance is a weighing instrument which helps in measuring the mass of a substance or more specifically the gravitational mass of the substance.
stop watch :a special watch with buttons that start, stop, and then zero the hands, used to time races.
Answer:
The screw gauge is an instrument used for measuring accurately the diameter of a thin wire. The screw gauge consists of a U-shaped frame fitted with a screwed spindle which is attached to a thimble. Parallel to the axis of the thimble, a scale is marked in mm. This scale is called pitch scale. To the head of the screw, a hollow sleeve is attached. Screw head has the ratchet arrangement, to avoid tightening of the screw.There is a circular scale on the timber known as head scale which is divided into 50 or 100 equal parts.
The vernier, dial, and digital calipers give a direct reading of the distance measured to high accuracy. They are functionally identical, with different ways of reading the result. These calipers comprise a calibrated scale with a fixed jaw, and another jaw, with a pointer, that slides along the scale. The distance between the jaws is then read in different ways for the three types.
A spherometer is defined as a precision device which is used to measure very small length of the order of mm. It consists of three outer legs and a fourth adjustable central leg and is best suited to measure radii of spherical surfaces.
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physical balance is an instrument used in laboratories to weigh objects. It's accuracy and sensitivity both are very high.
A stopwatch is a handheld timepiece designed to measure the amount of time elapsed from a particular time when it is activated to the time when the piece is deactivated. A large digital version of a stopwatch designed for viewing at a distance, as in a sports stadium, is called a stop clock