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1 Which one of the following is not a basequantity?

A Length B Weight C Current D Time

2 Which one of the following is not a baseunit?

A Celsius B Ampere C Kilogram D Second

3 All derived quantities can be derived from basequantities by

A addition operation or subtractionoperation

B addition operation or subtractionoperation or both

C multiplication operation or divisionoperation

D multiplication operation or divisionoperation or both

4 The S.I. base unit for mass is

A gram B miligram C kilogram D mikrogram

5 Which one of the base quantities is not involvein force?

A Length B Time C Temperature D Mass

6 Which of the derived quantities is thecombination of a base quantities only?

A ForceB Volume

C Acceleration

7 Which one of the following pairs of derivedquantities is true?

A Work and massB Force and current

C Pressure and temperature D Weight and potential difference

8 Which of the following physical quantities is abase quantity

A The weight of an astronaut on the Moonssurface is 10 N.

B The velocity of a cyclist rides a bicycle is

70 km h-1

C The perimeter of a field is 380 mD The power of a lamp is 60 W.

9 Which one of the base quantities is not involvein acceleration?

A LengthB MassC Time

10 Which one of the following apparatus is not

be used to measure the density of a metalcube?

A RulerB Stop watchC Triple beam balance

11 Which one of the following derived quantitiescontains length and time only?

A Velocity B Momentum B Force D Pressure

12 Which one of the following is true?

Physicalquantity

Type ofphysicalquantity

S.I. Unit

A Momentum Derivedquantity

Kg m s-2

B Temperature Base quantity oC

C Work Derivedquantity

kg m 2 s -2

D Area Base

quantity

m 2

13 Which of the following pairs of physicalquantities and S.I. units is true?

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Exercise 1 Form 41.1 Understanding Physics1.2 Understanding Base & Derived Quantities

NAME :FORM :

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Physical S.I. unit

quantity

A Area foot squaredB Weight Kilogram

C Power Joules per minuteD Density Kilograms per

metre cubed

14 Which of the following quantity is a scalarquantity.

A Weight B VolumeC Force D Acceleration

15 Which of the following quantity is a vectorquantity.

A Work B PowerC Velocity D Distance

16 Which one of the following pairs of vectorquantities is true?

A Impulse and areaB Power and pressureC Weight and velocity

17 (a) The current flows through a metal

conductor is defined by the equation

current = chargetime

Based on the equation, which of thequantities above are(i) base quantities

.......................................................(ii) derived quantities

.......................................................

(b) What are the S.I.units of charge?

...............................................................

18 The standard form for 15200 is

A 15.2 x 10 2B 1.52 x 10 3

C 1.52 x 10 4D 0.152 x 10 -4

E 1.52 x 10-5

19 The product of 2.4 x 10 -2and 5.0 x 10 - 4 is

A 1.2 x 10 6 B 1.2 x 10 5

C 1.2 x 10- 5 D 1.2 x 10- 7

E 1.2 x 10 -8

20 If A = 2 x 10 - 4 and B = 3 x 10 - 5then the value of A + 5B is

A 1.7 x 10 - 5 B 3.5 x 10 - 5

C 1.7 x 10 - 4 D 3.5 x 10 - 4

E 1.7 x 10 3

21 What is 0.0455 kg expressed in standard form?

A 0.455 x 10 - 1 kgB 4.55 x 10 - 2 kgC 45.5 x 10 - 3 kgD 455 x 10 - 4 kg

22 The prefixes according to their value in

ascending order are

A Giga,mega,kilo,centiB Mikro,mili,centi,kilo

C Mega,giga,kilo,centiD Centi,giga,mikro,mili

23 Radio 5 RTM station operates at 105 .6 M Hz.The expression of the frequency in units ofHz is

A 1.056 x 10 8 HzB 1.056 x 10 6 HzC 1.056 x 10 4 Hz

D 1.056 x 10 - 4Hz

E 1.056 x 10 - 8 Hz

24 5 x 10 - 4 seconds is equivalent to

A 0.05 microsecondsB 0.5 microseconds

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C 50 microsecondsD 500 microsecondsE 5000 microseconds

25 Which one of the following measurements isdifferent?

A 2.3 x 10 2 mB 2.3 x 10 4 cmC 2.3 x 10 6 mm

26 Which one of the following measurements issmallest ?

A 1.5 x 10 2 kgB 1.5 x 10 7 gC 1.5 x 10 12 g

27 The misprints of length according to their valuein ascending order are

A 7 x 10 - 4 km , 7 x 10 2 cm , 7 x 10 4 mmB 7 x 10 2 cm , 7 x 10 4 mm , 7 x 10 - 4 kmC 7 x 10 4 mm , 7 x 10 - 4 km , 7 x 102cm

28 The volume of a metal sphere is 12 cm 3.This volume in units of m 3 is

A 1.2 x 10 - 2 B 1.2 x 10- 3

C 1.2 x 10 - 5 D 1.2 x 10 7

E 1.2 x 10 - 9

29 The velocity of a car is 108 km h-1.What is the velocity in units of ms-1 ?

A 20 B 30C 50 D 60E 90

30 The pressure exerted by a box on a surface is500 N cm 2. What is the pressure in units of

Pa? ( 1 Pa = 1 N m - 2 )

A 5 x 10 - 2 B 5 x10 -1

C 5 x 10 4 D 5 x 10 6

E 5 x 10 8

31 The acceleration of a trolley is 2000 cm s- 2

This acceleration in S.I. unit is

A 0.002 B 0.02C 0.2 D 2

E 20

32 Which one of the following prefixes is lessthen 1?

A Mega

B DesiC Kilo

33 Which of the following is true?

A 0.00023 = 2.3 x 10 - 3

B 0.05 = 5 x 10 - 1

C 3450 = 3.450 x 10 4

D 46.531 =4.6531 x 10 4

E 5678.9 = 5.6789 x 10 3

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Value of physicalquantities S.I. unit

400 cm 2

m 2

216 km h -1

ms -1

4 mm 3

m3

1500 cm s -2

ms - 2

Complete the table above.

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Readings

7.2 x 105 m , 7.2 x 10-2 cm7.2 x 103 mm and 7.2 x 10

- 6 km

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The table above shows the measurement oflength for four different objects.

(a) Which reading is the longest ?

....................................................................

(b) Which reading is the shortest?

....................................................................(c) Arrange the readings according

descending order.

....................................................................

....................................................................

(d) Which reading is more than 1 metre?

....................................................................

(e) A cube of sides 7.2 x 103 mm . State the

volume of the cube in unit of m3

36 Write the following numbers in standard form.

(a) 0.00008 m

(b) 5300 g

(c) 0.0068 cm

(d) 567.13 km

(e) 345.2 x 104 m

(f) 0.000078 x 10-6 s

37 Convert the following lengths into the units ofmetre.

(a) 2.3 km

(b) 0.62 mm

(c) 3 x 106 cm

38 Convert

(a) 11.5 cm3 into the units of m3

(b) 72 km h-1 into the units of ms-1

(c) 5 g cm-3 into the units of kg m-3

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