Question 1
Which of the following is a base unit in the International System of Units (SI)?
A. Newton
B. Joule
C. Kelvin
D. Watt
Question 2
A student uses a vernier calliper to measure the diameter of a small ball. Which of the following best describes the calibration of the instrument?
A. Adjusting the zero error of the caliper
B. Increasing the range of measurement
C. Changing the unit of measurement
D. Enhancing the precision of the caliper
Question 3
Which of the following is NOT a derived unit?
A. Pascal
B. Hertz
C. Metre
D. Volt
Question 4
A scientist uses a barometer to measure atmospheric pressure. What type of instrument is a barometer?
A. Optical instrument
B. Pressure instrument
C. Temperature instrument
D. Length instrument
Question 5
Which of the following instruments would be best suited for measuring the volume of a liquid?
A. Ammeter
B. Graduated cylinder
C. Stopwatch
D. Micrometer screw gauge
Question 6
a) Define the term "base unit" in the context of the International System of Units (SI). [2]
b) List and briefly describe the seven base units in the SI system. [7]
Question 7
a) Differentiate between derived units and base units in the context of measurements in physics. [3]
b) Calculate the unit of force in the SI system using the base units. [4]
Question 8
a) Explain the importance of calibrating measuring instruments in physics experiments. [3]
b) A student uses a metre ruler that starts from 2mm instead of 0mm due to wear and tear. If the student measures a length as 50mm using this ruler, what is the actual length of the object? [4]
Question 9
a) What is the significance of the SI system in scientific measurements? [3]
b) Name three derived units and the base units from which they are derived. [3]
c) If a thermometer reads 102°C during boiling water's measurement but is supposed to read 100°C, how should the readings be corrected for future measurements? [4]
Question 10
a) Define scalar and vector quantities, giving two examples of each. [4]
b) If two vectors of magnitudes 5 units and 12 units are added, what are the maximum and minimum possible resultant magnitudes? [4]
c) Describe the process of calibrating a spring balance. [2]