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NECO (PHYSICS PRACTICAL) QUESTIONS nd ANSWERS WILL BE DROPED HERE..enter




NOTE: ^ means
Raise to Power.
Comma(,) means Next line eg:
SN: 1,2,3,4,5 means under SN u
will get 1,2,3,4 and 5 i.e under
SN, you will get 1, under 1, u
get 2, under 2, u get 3 and So
on. So using comma means that
you will draw a table and place
the numbers AS i explained





table sof values
sn:1,2,3,4,5
x(cm):10.0,15.0,20.0,25.0,30.0
Jk=y
(cm):70.60,68.10,65.50,62.80,60.30
y^-1(cm):67.2,65.5,63.4,61.1,59.0
p=y-
y^-1(cm):3.400,2.600,2.100,1.700,1.300

(1bi)
moment is the turning effect of
forces about a point or axis. e.g
rotation of wheels of vehicles.
the unit is Nm and it is a vector
quantity
principle of moments states
that if a body is in equilibrium,
then the sum of the clockwise
moments about any point on the
body is equal to the sum of the
anticlockwise moments about
the same point

(1 continues)
precaution:

(i)i ensured that m1 is
completely immersed in water

(ii)i ensure that parallax error is
avoided when taking readings

(1biii)
weight in air air=0.25
weight in water=0.15
upthrust=0.25-0.15=0.10
relative denstity= weight in air/
weight in water
relative density= 0.25/0.10
=2.5

(3)
tables of value
sn:1,2,3,4,5,6
I/A:0.1,0.2,0.3,0.4.0.5,0.6,
V/V:0.50,1.50,2.00,2.30,2.50,3.00
I/I^-1/
A^-1:10.000,5.000,3.333,2.000,1.667
V^-1/
V^-1:2.000,0.667,0.500,0.400,0.333

(3 continues)
precautions:
-i ensured tight connection
-i ensured error due to parallax
when taking reading from the
voltmeter

(3bi)
Ammeter:
-it is used for measuring current
-it is denoted by A
voltmeter:
-it is for measuring voltage
-it is denoted by V
3 cell. I=V/(R+r), V summation
of d cascaded emfs, r is d
summation of d cascaded
internal resistances since, its
same cell then. r=r=r,
Therefore I=V/ (R+3r)
Slope=y2-y1/x2-x1=
79-60/4-1.2
=19/2.8
=6.786





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Posted By CHEATMASTER On 06:23 Wed, 12 Jun 2013

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