VERIFIED 2017/2018 PHYSICS PRACTICAL ANSWERS BY EXAMBITER










Complet no1:::
 The internal diameter is 6.90cm Lo=125ml 1) S/N - |1|2|3|4|5| M(g) - |50.0|100.0|150.0|200.0|250.0| Lo(cm) - |50.0|50.0|50.0|50.0|50.0| L1(cm) - |60.0|70.0|80.0|90.0|100.0| y=L1-Lv(cm^3) - |10.00|20.00|30.00|40.00|50.00| V=0.785d^2y - |371.30|742.60|1113.90|1485.20|1856.50| NO1 graph 1aix) i)i avoided error due to parallel ii)i ensured that the mass is gently dropped into the liquid 1bi) Archimedes principle states that when a body is wholly or partly immersed in a liquid the weight of the body is equal to the mass of the fluid displaced 1bii) volume of the wood = 2.0 × 10^-5m^3 mass = 5.0 × 10^-3kg g = 10.0ms^-2 density of water = 1.0 × 10^3kgm^-3 volume of object = mass/density density = mass/volume density of the object = mass of the object/volume = 5.0×10^-3/2.0×10^-5 = 2.5×10^2kgm^3 upthrust = volume 0f the object × density of liquid × g =2.0×10^-5 × 1.5×10^2×10 = 0.3N ================================ NO3 GRAPH Click Here to View the Diagram 3) adjusted. TABULATE READINGS R(N) - |2.00| |4.00| |6.00| |8.00| |10.00| 1(A) - |2.85| |2.21| |2.00| |1.75| |1.65| R^-1 - |0.5| |0.25| |0.17| |0.13| |0.10| PRECAUTIONS i)i ensured clean terminals ii)i avioved zero error on the ammeter used iii)i ensured tight connection of all wires 3b) ohm's law states that the current flowing through a metallic conductor is proportional to its portential difference provided that physical condition is constant i.e V x I 3c) slope(s) = DR^-1/DI = 0.25-0.10/2.21-1.65 =0.15/0.56 slope(s)=0.27 intercept c = -0.35 evaluation 1/5=1/0.27=3.70 evalution 1/C = 1/-0.35 =-2.86





NOTE!!! 
U must not copy... There are two different solutions to your exam here... 

3aiii)
Vo=0.35V
TABULATE
S/N:1,2,3,4,5,6
R(ohm):1.0,2.0,3.0,4.0,5.0,6.0
V(v):1.40,1.65,1.80,2.00,2.10,2.15
R^-1(ohm^-1):1.000,0.500,0.333,0.200,0.167
V^-1(v^-1):0.714,0.606,0.556,0.500,0.476,0.465
3aiv)
DRAW THE GRAPH of V^-1(v^-1) against R^-1
3av)
Slope=change inV^-1/Change inR^-1
=(7.6-4.3)/(0.84-0.10)
3.3/0.74
=4.460
3avi)
Intercept=0.385
3avii)
I=0.385
I^-1=(0.385)^-1
=2.597



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