fizik q4 -

8/3/2019 FIZIK Q4 -

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PART A

10 Objective Questions. Answer all the questions .

1. Which is a base unit :

A AmpereB NewtonC JouleD Degree Celsius

2. Which of the following prefixes arranged in ascending order is

correct?

A Giga, mega, kilo, nanoB Kilo, nano, giga, megaC Kilo, mega, nano, gigaD Nano, kilo, mega, giga

3. which of the following error is a systematic error?

A Error due to the position of the eye not vertically

above the mark being readB Error due to the zero marks of the scales of the

vernier calipers not coinciding when the two

jaws are tightly closed.C Error due to the over tightening of the anvil

while turning the spindle of the micrometer

srewgauge.

4. which of the following statement is correct about the zero error?

A It can be reduced by taking repeated

measurements using the same instruments.

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B It can be reduced by finding the average value

of all reading from the same measurement.C It becomes smaller if the range of the scale of

the instrument is sufficiently large.

D It can be eliminated by checking the scales of instrument before measurement and then

making adjustments to the readings taken

5. which of the following steps can help eliminate a parallax error

while taking voltage reading from a voltmeter?

A Take repeated readings and calculate their

average value.B Use voltmeter which has a plane mirror under

the pointer.C Take voltmeter readings with the aid of the

magnifying glass.D Choose a more sensitive voltmeter.

6. which of the following measurement is obtained by using a pair

of vernier calllipers?

A 29.3 mmB 293 dmC 2.93 mmD 0.293 cm

7. which instruments are most suitable for the accurate

measurement of the thickness of coin and the internal diameter

of a beaker?

Thickness of coin Internal diameter of

beakerA Metre ruler Micrometer screw gaugeB Vernier callipers Micrometer screw gauge

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C Vernier callipers Metre ruleD Micrometer screw gauge Vernier calipers

8. Which of the following describes a scalar quantity?

A The acceleration of a bullet trainB The barking force needed to stop a track.C The amount of heat to boil 1000 cm3 of water.D The thrust needed to launch a rocket.

9. Which of the following phenomenon cannot be explained by

physics concepts?

A The formation of the rainbowsB The ebb and flow of the tidesC The ability of the chameleon to change to the colour

of the surroundings.D A pen appears bent in a glass of water.

10. which of the following devices is not a contribution of

Physic?

A Jet engineB Bionic limbs

C BiodieselD LCD television set

PART B :

3 structured questions. Answer all questions. Write your

answers in the spaces provided in the questions papers.

1. Base Quantities are

……………………………………………………………

……………………………………………………………………………………

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……………………………………………………………………………………

……

Base Quantity symbol SI UnitLength L Metre, m

2. Express the quantities below using prefixes and scientific

notation:

Quantities Prefixes Scientific Notation

384 000 000 m 384 Mm 3.84 x 108 m57 000 m km86 000 000 000s Gs0.000 002 34g µg0.004 A mA0.000 000 088 nm

3. Convert the following to the stated units:

2.56 Gm= m 2.35 km = mm

435 mm = cm 3 x 104 Mm = km

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2m2 = mm2 3 cm3 = mm3

1.2 gcm-3 = kgm-3 8.2 kmh-1 = ms-1

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Figure 1

4. Figure 1 shows a measuring device.

(a) Name the physical quantity measured by the device.

[1mark]

_______________________________________________________________________

_

(b) What is the reading shown by the device?

[1mark]

_______________________________________________________________________

_

(c) Explain how you would check for the zero error of this device.

[1mark]

_______________________________________________________________________

_

d) What is the value of the smallest division on the scale?

[1 mark]

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Figure 2

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5. Figure 2 shows a vernier calipers used to measure the external

diameter of a hollow PVC pipe.

(a)(i) Name the part labelled Y.

[1 mark]

_______________________________________________________________

(ii) What is the function of Y?

[1 mark]

____________________________________________________________

The external diameter of the PVC pipe is measured at four

different places, the readings are recorded in the table

(b) Why is the external diameter measured four times?

[1 mark]

__________________________________________________________ c) what is the value of the smallest division on the scale?

[ 1 mark]

OBJECTIVE ANSWER :

QUESTION

1 A B C D2 A B C D

3 A B C D4 A B C D5 A B C D6 A B C D7 A B C D8 A B C D9 A B C D10 A B C D

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