Unit 1 \\ Physical Quantities & Measurements | Class 9 Physics |Solved Textbook M.C.Qs

End of Unit Questions
Section (A)
Multiple Choice Questions (MCQs)

1. The Figure 1.26 shows part of a Vernier scale, what is the reading on the Vernier scale
a) 6.50 cm b) 6.55 cm
c) 7.00 cm d) 7.45 cm

2. 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 50 cm3 . What is the density of the steel?
a) 0.90 gm/cm3
b) 8.1 gm/cm3
c) 9.0 gm/cm3
d) 13.5gm/cm3

3. An object of mass 100g is immersed in water as shown in the figure 1.27, what is the density of the material from which object is made?
a) 0.4 g/cm3 b) 0.9 g/cm3 c) 1.1 g/cm3 d) 2.5 g/cm3


4. What is the reading of this micrometer in figure
a) 5.43mm b) 6.63mm
c) 7.30mm d) 8.13mm

5. A chips wrapper is 4.5 cm long and 5.9 cm wide. Its area upto significant figures will be
a) 30 cm² b) 28 cm²
c) 26.55 cm² d) 32 cm²

6. A worldwide system of measurements in which the units of base quantities were introduced is called
a) prefixes b) international system of units c) hexadecimal system d) none of above

7. All accurately known digits and first doubtful digit in an expression are known as
a) non-significant figures b) significant figures
c) estimated figures d) crossed figures

8. If zero line of Vernier scale coincides with zero of main scale, then zero error is
a) positive b) zero c) negative d) one

9. zero error of the instrument is
a) systematic error b) human error c) random error d) classified error

10. Length, mass, electric current, time, intensity of light and amount of substance are examples of
a) base quantities b) derived quantities c) prefixes d) quartile quantities

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