THE REAL PHYSICS PRACTICAL ANSWERS BUT
GUIDE TO PHYSICS PRACTICAL. IT WILL HELP
YOU TO STUDY YOUR PHYSICS PRACTICAL. THEY
ARE ASSUMED QUESTIONS AND ANSWERS.these was sent 2me.
QUESTION 1
Reading:
S/n: 1,2,3,4,5,6
L(cm): 150.0,120.0,100.0,80.0,60.0,40.0
t(sec):
4.800,4.100,3.300,2.600,1.900,1.200
t^-1(Sec^-1):
0.208,0.244,0.303,0.385,0.526,0.833
t^2(sec^2):
23.40,16.81,10.89,6.76,3.61,1.44
L/t^2(m/s^2):
6.510,7.139,9.183,11.83,16.6,27.7
Precautions:
-I ensured the experiment was not
affected by air interference when
determining the balance points
-I ensured the mass roll down freely
as being influenced under gravity
-I ensured that the readings were
taken without any error
DEFINITIONS YOU NEED TO KNOW:
FORCE OF GRAVITY: The total
gravitational force which acts on a
body and so enables it,in turn to
exert an equal force on its support
DISPLACEMENT: This Is defined as the
distance moved in a specified
direction
copie from nnaijahero.net
NEWTONIAN MECHANICS: This is defined as
the rate of change of distance moved
with time in a specified direction or
rate of change of displacement
UNIFORM VELOCITY: A body moved
with uniform velocity if its rate of
change of distance moved with time
in a specified direction is constant
ACCELERATION: This is defined as the rate
of change of velocity with time
INERTIA: The tendency of a body to
remain at rest or if moving,to
continue its motion in a straight line
from naijahero.net
UNIFORM ACCERATION: A body moved
with uniform acceleration,if its rate
of change of velocity with time in a
specified direction is constant
DECCELERATION: A decreasing velocity
or slowing down is usually called
retardation.
QUESTION 2
Readings:
S/n: 1,2,3,4,5,6,7
D: 100,90,80,70,60,50,40
D^2:
10000,8100,6400,4900,3600,2500,1600
X1:
80.60,70.20,59.10,47.80,29.00,20.35,9.16
X2:
18.30,19.00,20.00,22.00,7.60,4.50,1.02. L
(X1-X2):
62.20,51.20,39.10,24.70,21.40,15.85,8.14
PRECAUTIONS:
-i ensured parallax when reading the
metre rule.
-i ensured that the intensity or
source of light was maintained.
Expected Question:
An illuminated object is placed on the
axis of a converging lens and a
magnified image is obtained on the
screen. If the distance of the image
from the lens is 45cm and the
magnification is 2,cal the focal length
of lens.
Copie from naijahero.net
SOLUTION:
V=45.00cm
m=2
u=?
M=v/u=45/2
22.5cm
F=uv/v+u
22.5*45.00/22.5+45.00
=1012.5/67.5
=15cm
QUESTION 3
Readings:
S/n: 1,2,3,4,5
L1: 20,40,60,80,100
L2: 10,15,25,35,45
I1(A): 0.50,0.40,0.32,0.22,0.14
I2(A): 0.58,0.53,0.45,0.41,0.37
I1^-1: 0.20,2.50,3.13,4.55,7.143
I2^1: 1.724,1.890,2.22,2.44,2.70
PRECAUTIONS:
-I will ensure that the key is opened
when no reading is taken to avoid
battery wastage.
-I ensured tight connection
-I ensured error due to parallax when
taking
reading from the ameter
from naijahero.net
-i will ensure that the circuit element
are tightly connected to ensure
accurate result
NEED TO KNOW:
-Electromotive force is the potential
difference between the terminals of
a cell when no current is flowing in
the circuit.
NOTE THAT ^ MEANS RAISE TO
POWER.
Eg: 2^4 Means 2 raise to power 4.
L^-2 means L raise to power -2(minus two)
-COMMA MEANS NEXT LINE.
Eg: x: 4,2,3,4,5 means that you draw a table,
then under x, you will get 4, under 4 is 2,
under 2 is 3, under 3 is 4 and so on.
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