ExerciseChapter 1.3: Understanding scalar and vector quantities &Chapter 1.4 Understanding measurement

1 Which of the following is a SI base unit?A decimetreB meterC kilometreD Megametre

2 Which of the following set is the set of prefixes arranged in ascending order?A nano, mega, mili, kiloB mega, kilo, nano, miliC nano, mili, kilo, megaD kilo, mili, mega, nano

3 Time, work and speed areA base quantitiesB derived quantitiesC scalar quantitiesD vector quantities

4 Diagram 4.1 shows the existence of zero error when the gap of a micrometre screw gauge is closed.Diagram 4.2 shows the reading of micrometre screw gauge after an object is placed for the measurement of its thickness.

The actual reading of the thickness isA 2.25mmB 2.28mmC 2.75mmD 2.78mm

5 The ability of an instrument to detect a small changes in the quantity can be measures is calledA accuracyB precisionC sensitivityD error

6 Which of the following quantities below is a base quantity?A MomentumB TimeC SpeedD Force

7 Which physical quantity has the correct SI unit?Physical quantity S.I. UnitA Time minuteB Mass NewtonC Length metreD Temperature Celcius

8 Figure 1(a) shows the existence of zero error of a vernier calliper. Figure 1(b) shows the reading of the vernier calliper for diameter of metal sphere.

Figure 1

The actual reading of diameter of the metal sphere isA 2.02 cmB 2.04 cmC 2.06 cmD 2.08 cm

9 Which of the following measurements is the smallest?A 1.5x102 kgB 1.5 X10 7 gC 1.5 x10 12 g

10 Which measurement has the greatest value?A 1.13x108mmB 1.13x108cmC 1.13x108 mD 1.13x108nm

11 Density of mercury is 13600 kgm-3 which is equivalent toA 0.136 gcm-3B 1.36 x10-2 gcm-3C 1.36 x10-3 gcm-3D 13.6 gcm-3

12 Diagram 12 shows a micrometre screw gauge.

Diagram 12What is the reading of the micrometre?A 6.00mmB 6.02mmC 6.45mmD 6.48mm

13 Hot FM is transmitted with a frequency of 88.2 M Hz. This frequency is equal to A 8.82 x105 HzB 8.82 x106 HzC 8.82 x 107 HzD 8.82 x108 Hz

14 Which of the following is a base quantity and its SI Unit?A Mass/gB Time/hC Current/mAD Temperature/K

15 Which of the following unit is correct?Quantity SI Unit A Forcekgms-2B Densitykgm-2 C Aream3D Acceleration ms-1

16 An experiment is carried out to find the relationship between mass and acceleration of trolley on a wooden runway. The experiment is repeated by adding the number of trolley. The responding variable in this experiment is

A the length of the wooden runwayB accelerationC massD time

17 Which of the following shows the relation between the base quantities for density?

A

B

C

D

18 The table shows the results obtained from an experiment to examine the resistivity of a wire.

Diameter of wire/ mmCurrent/APotential difference/ V

0.400.363.6

0.800.413.8

1.200.554.5

1.600.725.0

2.000.885.2

Which of the following statement is true about the experiment?A The smallest scale on the ammeter is 0.02A.B The smallest scale on the voltmeter is 0.1V.C The diameter of the wire is the responding variable.

19 A vernier calliper is shown in the diagram below.

The vernier calliper is used to measure the diameter of a marble. The reading produced has to beA subtracted by 0.07cmB added with 0.07cmC subtracted by 0.03cmD added with 0.03cm

20 The graph in Diagram 19 shows the relationship between s and t.

Which of the following equations represent the graph in Diagram 19?A s = + mB s = + nC s = + mD s = + nE s = + m

21 State the reading of the vernier calliper.(a)

-----------------------------(b)

----------------------------(c)

---------------------------------(d)

-----------------------------------

22 State the reading of the micrometer screw gauge.

50 10 15 20 25

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23 What is the error made in measurement when we position our eyes wrongly?_______________ errors are made due to the wrong positioning of the eyes.

24 (a)

Figure 24(a)

Measurement taken in Figure 24(a) =

Figure 24(b)

Measurement taken in Figure 24(b)=

(b) 152030252015152030252015

In Fig 24(a), the eyes are placed at the wrong position hence the reading taken is inaccurate. The correct way is shown in Fig 24(b).Hence to avoid parallax errors in a metre rule, ensure that the eyes are placed ______________________________to the reading to be measured.

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