SECTION A (ANSWER ALL QUESTIONS)

SECTION A (ANSWER ALL QUESTIONS)

1Which one of the following is not a base quantity?

A LengthB Weight C Current D Time

2 Which one of the following is not a base unit?

A Celcius

BAmpere CKilogram

DSecond

3 The S.I. base unit for mass is

A gram

Bmiligram C kilogram Dmicrogram

4Which of the followinq quantity is a scalar quantity.

AWeight

BVolume CForce

DAcceleration5The standard form for 15200 is

A 15.2 x 10 2B 1.52 x 10 3 C 1.52 x 10 4 D 0.152 x 10 -4 E1.52 x 10-5

6The 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

7Radio 5 RTM station operates at 105 .6 M Hz.The expression of the frequency in units of Hz is A 1.056 x 10 8 Hz B 1.056 x 10 6 Hz C 1.056 x 10 4 Hz D 1.056 x 10 - 4 Hz

E1.056 x 10 - 8 Hz

8 The volume of a metal sphere is 12 cm 3. This volume in units of m 3 isA 1.2 x 10 - 2B 1.2 x 10 - 3 C 1.2 x 10 - 5 D 1.2 x 10 7 E 1.2 x 10 - 99 The velocity of a car is 108 km j-1. What is the velocity in units of ms-1 ?A 20 B 30 C 50 D 60 E 90

10Which one of the following measurements is different?

A2.3 x 10 2 m B 2.3 x 10 4 cm C 2.3 x 10 6 mm

11 5 x 10 - 4 seconds is equivalent to

A0.05 s B 0.5 s C 50 s D 500 s E 5000 s

12The ability of an instrument to detect a slight change that occurs in the measured quantity is called as

AprecisionBaccuracy Csensitivity

Derror

13The ability of an instrument gives consistent reading , when repeated readings are taken is called asAaccuracyBprecision Csensitivity

Derror

14Which of the following is most likely to show a precise shooting?15Which of the following statements about errors is correct?

AZero error is random error BRandom errors can be reduced by taking repeat readings.

CSystematic errors can be due to instruments which are not sensitive.

16Table shows readings of the thickness of a book measured by four different students. Which of the students recorded the true readings.

StudentRuler / cmVernier calipers / cmMikrometer screw gauge /mm

ABC

DW

X

Y

Z2.17

2.174

2.17

2.22.2

2.2

2.174

2.172.1

2

2.174

2.17

17Diagram shows a micrometer screw gauge reading when it is closed at its gap.

The subsequent readings must be corrected by

A adding 0.02 mm B subtracting 0.02 mm C adding 0.03 mm D subtracting 0.03 mm

18The diagram shows the existence of zero errors of a vernier calipers.

What is the value of the zero error?

A + 0.04 cmB - 0.04 cm C + 0.06 cm

D - 0.06 cm

19Which of the following graphs show that y increases linearly with x?

20 P

10 Q 5

The equation of the graph above is

A P = 10Q + 5 BP = 2Q + 10 C P = -2Q + 10 DP = 5Q 10

SECTION B (ANSWER ALL QUESTIONS)

Diagram 1.11. Diagram above shows the reading of a micrometer screw gauge for the thickness of 5 sheets of paper.

(a) State is the sensitivity of a micrometer screw gauge. ...(1 mark)(b) Name the parts labelled M.

...(1 mark)

(c) State the function of the parts labelled M.

..........................................................................................................................................................(1 mark)(d) State the reading of the micrometer screw gauge shown Diagram 1.1 ..........................................................................................................................................................(1 mark)

(e) Calculate the thickness of on sheet of paper. ..........................................................................................................................................................(1 mark)

Diagram 2.2

2. Diagram 2.2 shows the reading of a vernier callipers used to determine the diameter of a metal bob.

(a) State the the type and the value of the error shown in Diagarm 2.2 (a).

..(2 marks)

(b) State the function of the part labelled P.

...(1 mark)

(c) State the reading of the vernier callipers on Diagram 2.2 (b).

..........................................................................................................................................................(1 mark)

(d) State the actual diameter of the metal bob ..........................................................................................................................................................(1 mark)

3.A student carries out an experiment to investigate the relationship between mass of a spring, m and the period of oscillation, T of a steel spring. The students uses different weights of springs and record the corresponding period, T The student then plots a graph of T2 against m as shown in Diagram 3.

(a) Based on the graph on Diagram 3,(i) state the relationship between T2 and m.

.........................................................................................................................................................(1 mark)

(ii) calculate the value of T when m = 0.4 kg. Show on the graph how you determine the value.

( 3 marks)

(iii) calculate the gradient, n of the graph T2 against m . Show on the graph how you determine the value.

( 3 marks)(b) Elasticity of the spring, k given by the quation k = 4 2 , where n is the gradient of the graph T2 against m.

n

Calculate the value of k.

(2 marks)

(c) State a precaution that can be taken during the experiment.

.........................................................................................................................................................(1 mark)

(d) Diagram 3

4. A student carries out an experiment to investigate the relationship between mass, m of a material and its volume, V. A slotted weight of mass 50.0 g is gently immersed into a measuring cylinder containing water. The arrangement of the apparatus for this experiment is shown in Diagram 4.1. Diagram 4.2 shows the initial water level, V0, in the measuring cylinder before the slotted weight is immersed in it.Diagram 4.3 shows the water level in the measuring cylinder when a 50.0 g slotted weight is immersed in it.

The procedure is repeated with masses, m = 100.0 g, 150.0 g, 200.0 g and 250.0 g. The corresponding water levels in the measuring cylinder are shown in Diagram 4.4, 4.5, 4.6 and 4.7 on page 6 .

(a) For the experiment described on page 6, identify:

(i) The manipulated variable

........................................................................................................................................................(1 mark)

(ii) The responding variable

.......................................................................................................................................................(1 mark)

(iii) Constant variable

.......................................................................................................................................................(1 mark)

(b) For this part of the question, write your answers in the spaces provided in the corresponding diagrams.(i) Based on Diagarm 1.2 on page 6, record the reading of, Vo. (1 mark)

(ii) Based on Diagram 1.3, 1.4, 1.5, 1.6 and 1.7 on page 6 record the reading of Vi. (2 marks)(iii) Calculate V for each value of Vi in 4(b)(ii), using the formula V = (Vi - Vo). Record value of V. (2 marks)

(c) Tabulate your results for all values of m, Vi and V in the space below.

(2 marks)

(d) On the graph paper on page 8, plot a graph V against m. (5 marks)

(d) Based on the graph in 4 (d), state the relationship between V and m.

.........................................................................................................................................................(1 mark)

EMBED PBrush

EMBED PBrush

metal bob

P

Diagram 4.1

Diagram 4.2

Diagram 4.3

Diagram 4.4

Diagram 4.5

Diagram 4.6

Diagram 4.7

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