Physical World and Measurement

Units and Dimension All measurements have two parts: a quantitative magnitude and a unit. If you want to do mathematical operations using different quantities, the magnitudes should keep the same unit. Systems of Units The most common types of systems are shown below: – C.G.S. or French system: this system has for length unit the […]

Introduction SI is built on a foundation of seven fundamental standards known as base units. The fundamental SI units are multiplied, divided, or powered in many ways to get the other SI units, such as: A newton metre is a unit of mechanical work that is defined as force multiplied by the distance travelled. Area

When it comes to measuring temperature, there are a variety of scales of units. The scales are marked on every thermometer used to measure the temperature of a human body. A thermometer is an instrument that is used to determine the temperature. According to the discipline of Thermodynamics, Fahrenheit, Celsius, and Kelvin are the three

A potentiometer is a device that is used to measure a cell’s internal resistance, compare the e.m.f. of two cells and determine the potential difference throughout a resistor. It is made up of a long wire with a consistent cross sectional area and a length of 10 metres. Wire material should be highly resistive and

Physics is related well with fundamental laws of nature that apply to a wide range of situations in life. Our everyday lives are replete with the usage of measuring, which makes things simpler for us to grasp the fundamentals of physical quantity. Physical quantities could be explained in aspects of a unit of such a

In day to day life, we always see the use of physical quantities like when we buy milk from the shop, or vegetables from the market we use kilogram (kg), litre (L) or when we are going some place and wants to know the distance covered, then we ca use physical quantities like m, km,

Standard Units of Measurement A standard unit of measurement is a way of putting a common language to a quantifiable quantity.  It is through units that we can understand the relationship between objects and measurements. Measurements are essential for understanding quantities, so it is important to understand how they work and what kinds of units

Measurement is a process by which we can weigh or measure any physical quantity of material using equipment and instruments. Measurements of physics quantity can be expressed by a unit known as numerical. By measuring a physics quantity, we can define the property of the material. We can measure mass, weight, and different physical properties

A micrometer, also known as a micrometer screw gauge, is a device with a calibrated screw that is widely used in mechanical engineering and machining, as well as the majority of mechanical trades, in conjunction with other meteorological instruments such as dial, vernier, and digital calipers, for accurate measurement of components. Micrometer or screw gauge

There is no such thing as a perfect measurement. The measured value of a physical quantity is never the same as the true value of the quantity. Error is defined as the difference between a physical quantity’s true value and its measured value. It is impossible to eliminate the errors associated with methods of measurement