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Quiz: Physics - Physical Quantities, Units And Measurement

Which instrument should be used to measure the diameters of a test tube?

Measuring tape Metre rule Micrometer screw gauge Vernier caliper

The watt (W) is the SI unit of power, defined as the rate of doing work. Which of the following expresses the watt in base SI units?

kg·m²·s⁻² kg·m²·s⁻³ kg·m·s⁻² kg·m·s⁻³

Which pair correctly represents a scalar and a vector?

Impulse and force Mass and displacement Velocity and acceleration Work and time

A vernier caliper has a zero error of +0.02 cm. If the reading shown is 2.30 cm, what is the corrected reading?

2.27 cm 2.28 cm 2.30 cm 2.32 cm

Two forces of 5 N and 12 N act at right angles. What is the magnitude of the resultant force?

12 N 13 N 17 N 7 N

To determine the period of a simple pendulum accurately, a student should measure the time for

about 20 oscillations and divide the total time by 20. as many oscillations as possible in 5 seconds. one oscillation several times and find the average. one oscillation using a stopwatch.

What is a reasonable estimate for the thickness of a single page in a standard textbook?

0.1 cm 0.1 mm 1.0 cm 1.0 mm

Which is the correct scientific notation for 0.00045 m?

4.5 × 10⁴ m 4.5 × 10⁻³ m 4.5 × 10⁻⁴ m 45 × 10⁻⁵ m

A stopwatch measures time to the nearest 0.001 s. Which of the following is the precision when a person is using this instrument to measure time?

0.001 s 0.01 s 0.1 s 1 s