P9 Chapter 1

The following figure shows part of a Vernier scale, what is the reading on the Vernier scale?:

• 6.50cm

• 7.00cm

• 6.55cm

Ten identical steel balls each of mass 27g, are immersed in a measuring cylinder having 20cm³ of water. The reading of water level rises to 50cm³. What is the density of the steel?

• 0.90gm/m³

• 9.0gm/cm³

• 1.1gm/cm³

• 5.43mm

• 7.30mm

What is the reading of this micrometer in the following figure?

• 6.63mm

• 0.9mm

• 13.5mm

Zero error of the instrument is:

• systematic error

• random error

• human error

• classified error

An object of mass 100g is immersed in water as shown in the following figure, what is the density of the material from which the object is made?:

• 0.4gcm³

• 2.5gcm³

• 0.9gcm³

• 1.1gcm³

All accurately known digits and first doubtful digit in an expression are:

• non-significant figures

• significant figures

• estimated figures

A chips wrapper is 4.5 cm long and 5.9cm wide. Its area up to significant figure will be:

• 28cm²

• 32cm²

• 26.55cm²

A worldwide system of measurements in which the units of base quantities were introduced is called:

• International system of units

• None of above

• derived quantities

• quartile quantities

If the zero line of the Vernier scale coincides with zero of the main scale, then zero error is:

• positive

• negative

Length, mass, electric current, time, intensity of light and amount of substance are examples of:

• derived quantities

• base quantities

• prefix

• quartile quantities