Jn_ studys

 Method of measurement:    1. Direct method      2. Indirect method  🔘 Direct method : In these method , the unknown quantity is directly compared against a stander . Direct method are quite common for the measurement of physical quantities like length , mass,   etc 🔘 Indirect method : these method  are must of case are inaccurate because factors . They are also less sensitive. Errors of measurement  1. Gross error: This class of errors mainly covers human mistakes in reding instruments and recording and calculating measurement results . The responsibility of the mistake normally lies with the exprement . The exprementer may grossly misread with the system.  2. Systematic error : This errors are type are divided in three categories  ￫  i) instrumental errors : This errors mainly due to i herent shortcomings in the instrument . Misuse of the instrument . And loading effect of instruments.                   ii) environmental errors : This errors are due to condition