4 Most VSAQ’s of Units and Measurements Chapter in Inter 1st Year Physics (TS/AP)

2 Marks

VSAQ-1 : Distinguish between accuracy and precision.

  1. Accuracy: Refers to how close a measured value is to the true or accepted value. High accuracy indicates that the measurement is very close to the actual value.
  2. Precision: Indicates the consistency of repeated measurements. High precision means that the measurements are very similar to each other, regardless of how close they are to the true value.

VSAQ-2 : How can systematic errors be minimized or eliminated?

Systematic errors in experiments can be minimized by improving experimental procedures and using more accurate instruments. Key practices include calibrating equipment regularly and repeating measurements to enhance accuracy and reduce biases. This approach helps in achieving more reliable and valid results.

VSAQ-3 : Distinguish between fundamental units and derived units.

  1. Fundamental Units: These are the basic units of measurement that are independent and cannot be broken down into simpler units. Examples include meters for length, kilograms for mass, and seconds for time. They form the foundation for all other measurements in physics.
  2. Derived Units: Derived units are formed by combining fundamental units. They measure complex quantities like force, speed, and energy. An example is the newton, a unit of force, which is derived from meters (length), kilograms (mass), and seconds (time).

VSAQ-4 : Why do we have different units for the same physical quantity?

We use various units for the same physical quantity to suit different measurement systems and facilitate easier calculations. For instance, energy is measured in Joules in the SI system and ergs in the CGS system. This diversity in units accommodates measurements over a wide range and simplifies calculations in various contexts, offering flexibility and convenience in scientific disciplines.