Measuring instruments Ended
 Principle, Least count and Range  Errors of measurement  Systematic Error  Random Error  Fractional error and percentage error Errors Ended
 Metre ruler  Vernier calipers - explains vernier principle, uses vernier caliper to measurements. Principle of Vernier Ended
 Micrometer screw gauge - explains micrometer principle  Spherometer  uses of micrometer screw gauge, and spherometer Micrometer Screw Gauge (Theory and Past Papers) Ended
 Travelling microscope  Triple beam balance/Four beam balance/electronic balance  Stop clock/stopwatch/ Digital stopwatch  Digital multimeter