Page 62 - Physics
P. 62
Physics for Secondary Schools
Revision exercise 2 0 cm 1 cm
Section A
1. Choose the most correct answer
(i) To measure the length using a metre
rule, wrong position of the eye leads 0 5 10
to: Figure 2.43
(a) parallax error.
(b) eye error. (a) 0.3 mm (c) -0.3 mm
(c) zero error. (b) 0.7 mm (d) -0.7 mm
(d) metre error.
(ii) Which of the following instruments Section B
is most suitable for measuring the 2. (a) From the listed objects, classify
internal diametre of 100 ml beaker? them in terms of regular or
(a) Metre rule. irregular shape. Objects: Cube,
orange, stone, banana,
(b) Vernier calliper. water pipe, a house, cuboid,
(c) Measuring tape. chalkboard.
(d) External calliper. (b) The internal and external radius
(iii) The mass of an object is reduced if of a hollow silver sphere are
its 7 cm and 14 cm, respectively.
(a) state is changed. Find its volume.
(b) amount of matter is reduced. (c) A student measures the length of
a table to be 1.5 m with a ruler
(c) surface is reduced. that has a precision of 0.1 cm.
(d) volume is reduced. What is the uncertainty in the
(iv) A cuboid with length 3 cm, width 4 measurement?
cm and height 10 cm is made from 3. In a vernier calliper, there are 10
wood. The actual volume of the divisions on the vernier scale and
cuboid is 1 cm on main scale is divided in
(a) 120 cm . 10 parts. While measuring a length,
3
the zero of the vernier scale lies
(b) 240 ml. just ahead of 1.8 cm mark and 4th
(c) 120 m . division of vernier scale coincides
3
(d) 240 cm . with a main scale division. Find the
3
value of the length.
(v) What is the zero-error shown in the 4. (a) Differentiate between the mass
Figure 2.43? and the volume of a substance.
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Student’s Book Form One
Physics Form 1 Final.indd 56 16/10/2024 20:55
