possible experimental errors

Sometimes, even if the error is known, it cannot be corrected due to imperfection in the experimental arrangement. e.g., Loss of heat due to radiation in calorimetry. These errors always exist, but observations can be correcte..

If the same error is repeated every time in a series of observations, the error is said to be constant error. Constant error is due to faulty calibration of the scale of a measuring instrument. In order to minimise the constant error, measurements ..

Summary - International System of (SI) unit has been adopted for measurement by scientists all over the world. Three fundamental units needed in physics are those of lengths, mass and time. Units of all other physical quantities we come across in physics are derived from these fundamental units. Le..

Suppose X = ab Let D a and D b be absolute errors in measurements of quantities a and b, values of a and b and D X be the maximum possible error in X. Dividing both sides by X = ab, we get are relative errors of fractional errors in values ..

Measurement of Length - Different types of lengths are measured by using different types of instruments. Lengths like the length of cloth or length of a line can be measured by using measuring tape, a metre scale or a foot rule. But these instruments cannot be used to measure the diameter of a meta..

) and the zero of the circular scale should be opposite to the datum line of the sleeve. If the zero is not coinciding with the datum line, there will be a positive or negative zero error as shown in figure below. Zero error in case of screw gauge While taking a reading, the thi..

The goal of physics is to provide an understanding of nature. The science of physics was developed to explain our physical environment. Great Physicists like Galileo, Newton, and Einstein etc. framed laws to explain the various phenomena in nature. These laws have been verified experimentallyh..

Pour water into a clean measuring cylinder (nearly three fourth of its volume) and note the level of water. To avoid parallax error, reading must be taken at the lowest level of meniscus or curved surface of the liquid as shown in the diagram below. Attach a string to the solid and lower..

Although Rutherford's model was enormously successful at explaining the scattering of alpha particles, there was a problem when the experimental data were used to calculate the mass of the nucleus. From the results of the scattering experiments, it was possible to calculat..

. It must be noted here that scientific theories and laws are always provisional. Since scientific investigation is a human mental activity, to obviate human errors, it is necessary to confirm or reject the experimental results based on repeated investigations (if necessary by m..