latihan 1 - understanding measurements

8/18/2019 Latihan 1 - Understanding Measurements

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1 The ability of an instrument

gives consistentreading , when repeated readings are taken iscalled as

A accuracy B precisionC sensitivity D error

2 Which of the following should be the smallvalue ,so that the precision becomes high?

A Actual value B MeanC Relative error D Relativedeviation

3 The ability of an instrument to detect a slight

change that occurs in the measured quantity iscalled as

A precision B accuracyC sensitivity D error

4 The accuracy of an instrument increases if

A the number of significant figures increasesB the relative deviation relative increasesC the relative error increases

5 ased on the table below, what are themeasuring instruments !, " and #?

Measuring instruments Measurement

! $%&$ '(%() cm

" )&%$'(%) cm

# )$&%*'(%) g

! " #A Micrometer +ernier pring screw gauge calipers balanceB Micrometer +ernier Triple beam

crew gauge calipers balanceC +ernier Metre Triple beam

calipers ruler balance

6 Which of the following is true?

A The paralla- error is not effected to theaccuracy

B The accurate instrument is also thesensitive instrument

C The accuracy increases when the

measurement nearest to actual value%

7 Which of the following is true?

A A stop watch is more sensitive than anelectronic

B An ammeter is more sensitive than agalvanometer

C A vernier calipers is more sensitivethan a metre ruler

D A thinner.walled bulb thermometer is moresensitive than a thicker /walled bulb

thermometer

8 Which of the following is most likely to show aprecise shooting?

9 Which of the following is most likely to show anaccurate shooting but not so presicely?

10 0t take &%() s for an ob1ect to move to a certain

distance% When an electronic watch is used thetime is recorded as *%2& s% What is thepercentage of error?

A (%3 4 B $%) 4C 5%$ 4 D &%$ 4E 6%6 4

11 Which of the following statements about errorsis correct?

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A 7ero error is random errorB Random errors can be reduced by taking

repeat readings%C ystematic errors can be due to

instruments which are not sensitive%

D ystematic errors cause the readingsscattered on both sides of the actualvalue%

12 Which of the following e-periment techniquescan reduce systematic error of the quantitybeing measured?

A Measuring the diameter of a wire atdifferent points along the wire%

B Ad1usting an ammeter to read 8ero beforemeasuring a current%

C Timing a large number of oscillations tofind the period of a pendulum%

D Measuring the thickness of a large numberof pieces of paper to find the thickness ofone piece%

13 The error is caused by the position of eye is notparallel to the scale of an instrument is called as

A positive 8ero errorB negative 8ero errorC paralla- error

14 The following table shows the readingsmeasured by using different measuringinstruments 9, : dan 7%

Measuring instrument Reading ; mm

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$%52&$3%&

Which of the following is true? 9 : 7

A Ruler +ernier calipers Mikrometerscrew gauge

B +ernier Mikrometer Measuringcalipers screw gauge tape

C Measuring Ruler +ernierTape calipers

D Mikrometer Ruler +ernier crew gauge (%(* cm B . (%(* cmC > (%(3 cm D . (%(3 cm

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19 The following diagram shows a vernier calipers%

What is the reading of the vernier calipers ?

A 5%)6 cm B 5%(2 cmC $%)2 cm C $%(6 cm

20 igure@a shows the e-istence of 8ero error of avernier calipers% igure@b shows the reading of

the vernier calipers for diameter of metalsphere%

The actual reading of diameter of the metalsphere is

A $%($ cm B $%(* cmC $%(3 cm D $%(2 cm

21 The thickness of a paper is measured by using amicrometer screw gauge should be recorded as

A $ mm B $%) mmC $%)* mm D $%)*$ mm

22 Biagram shows a micrometer screw gauge%

ased on the diagram, what is the number ofrevolution of the thimble%A )$ B )$C C )5 D )5D

23 Biagram shows a micrometer screw gaugereading when it is closed at its gap%

The subsequent readings must be corrected byA adding (%($ mmB subtracting (%($ mmC adding (%(5 mmD subtracting (%(5 mm

24

ased on the diagram above, the thickness of asheet of paper is

A 5%$& cm B 5%6& cmC (%5$& cm D (%(56& cm

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25 igure@a shows the e-istence of 8ero error of amicrometer screw gauge% igure@b shows thereading of the micrometer screw gauge fordiameter of metal wire%

The actual reading of diameter of the metal wireis

A 2%5( mm B 2%5$ mmC 2%2( mm D 2%2$ mm

26 A simple pendulum makes $( complete swingsin $(%5& s% Which of the following is used?

A top watchB Eendulum clockC Flectronic watch

27 A mass hanging from one end of a vertical

spring makes ten complete oscillations in )& s%0f the time of the oscillations is taken by a stop

watch ,it should be recorded as

A )& s B )&%( sC )&%(( s D )&%((( s

28 The figure shows a thermometer%

What is the reading shown?

A =3o < B =5%&o <

C =*%( o < D =*o <

29 Which of the following will increase thesensitivity of a mercury.in.glass thermometer;

Glass stem wall


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33

Measurement Measurn! Instrument A""ura"# $"m%

Biameter of a copper wire

#ength of a pencil

0nternal diameter of a beaker

@a


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Biagram above shows the reading of a mikrometer screw gauge for the thickness of & sheets of paper%

$a% What is the number of revolution of the I scale %

HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH$'% Betermine the thickness of a sheet of the paper in cm%

$"% Give the name and the function of M scale%

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%$(% tate a precaution to be taken while taking measurements by using the micrometer screw gauge%

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%36

Biagram above shows a thermometer%$a% Iame component

@i E HHHHHHHHHHH%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

@ii J HHHHHHHHHHH%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

$'% tate the accuracy of the thermometer%

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%$"% What is the reading of the thermometer?

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%$(% Why does the glass stem wall of the thermometer is thin?

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

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$e% Kow should you do to increase the accuracy of the thermometer%

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%HHHHHHHHHHHHHHHHH$)% Why does the thermometer use mercury?

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

$!% Braw a dotted line to show the correct position of eye in the above diagram while measuring the

temperature of a substance%

37 Biagram shows a miliammeter%$a% Give the name and the function of component of

@i A %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%HH%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

@ii HHHHHHHHHHHHHH%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%$'% tate the accuracy of the ammeter

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%$"% tate the reading of the ammeter%

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%$(% tate t*& precautions to be taken while taking measurements by using the ammeter%

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH

HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH

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latihan 1 - understanding measurements

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