What is the SI unit of force?

Which of the following is used to measure electric current?

What does a micrometer screw gauge measure most accurately?

A steel rod is measured using a vernier caliper. The main scale reads 12 mm and the vernier scale reads 0.06 mm. What is the total length of the rod?

If a measuring tape is stretched and gives a reading longer than the actual length, what type of error is this?

A voltmeter is connected across a resistor and shows a reading of 5 V. If the resistance is $$10\,\Omega$$ , what is the current through the resistor?

A thermometer is calibrated incorrectly and always reads 2°C higher than the actual temperature. What kind of error does this represent?

You are given a vernier caliper with a zero error of $$-0.02$$ mm. If the measured length is 25.30 mm, what is the true length?

A student measures the diameter of a wire three times and gets values of 1.20 mm, 1.22 mm, and 1.21 mm. What is the average diameter?

A student is asked to design an experiment to measure the thickness of a sheet of paper using a micrometer screw gauge. Which of the following steps is most important to ensure accuracy?

You are given a set of measurements: 5.1 cm, 5.3 cm, 5.2 cm, and 5.4 cm. How would you determine if there is a random error in the measurements?

A student finds that the measured value of a resistor is consistently higher than the actual value. What should the student do to identify the source of error?

You are tasked with measuring the volume of an irregularly shaped stone. Which method would provide the most accurate result?

A student is planning an experiment to measure the acceleration due to gravity using a pendulum. Which factor should the student control to ensure reliable results?

You are given a digital balance that sometimes shows fluctuating readings for the same object. What is the best way to report the mass of the object?