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# 2018 Neco Physics Practical Questions and Answers | Physics Practical Expo

2018 Neco Physics Practical Questions and Answers is available ,Physics Practical 2018 Neco Exam Runs, all you need to do is to follow the instructions above, get verified Physics Practical Questions and Answers here, question and answers are now Available. expo for Neco 2018 Physics Practical, exam runs for Physics Practical Questions and Answers

Physics Practical and Economics Questions and Answers are Ready Whatsapp 08065889844 if you need it (2a)
In a tabular form:

Under tita°:
75, 65, 55, 45, 35

Under MO(cm):
1.1, 2.0, 2.5, 3.4, 3.9

Under NO(cm):
6.2, 6.4, 6.6, 6.8, 7.2

Under H=MO/NO:
0.177, 0.313, 0.379, 0.500, .542

Under Costita:
0.2588, 0.4226, 0.5736, 0.7071, 0.8192

(2axiii)
From the graph
Slope, S =Δcostita/^ΔH
= 0.75-0.45/0.5-0.3
= 0.3/0.2
=1.5

(2axiv)
(i) I ensured both the object and the pins were in straight lines so as to avoid error due to parallax.
(ii)  I made sure there was no air interference

(2bi)
Snell's law of refraction states that the ratio of the sine of angle of incidence to the sine of the angle of refraction is a constant for a given pair of media.
I.e Sini/sinr = Π
Where Π is known as refractive index.

(2bii)
Given refractive index of glass = 1.5
i.e aΠg = 1.5(from air to glass)
SinC/sin90 = gΠa
SinC/Sinn90 = 1/aΠg
SinC/1 = 1/1.5
SinC= 0.6667
C = sin^-1(0.6667)
Critical angle for glass C = 42°

====================================================

(3a)
(ii) Vo = 2.00v

(3av)
In a tabular form
Under S/N
1, 2, 3, 4, 5

Under R(ohms):
2, 3, 4, 5, 6

Under V(v):
2.10, 2.30, 2.40, 2.50, 2.60

Under R^-1:
0.500, 0.333, 0.250, 0.200, 0.167

Under V^-1(v^-1):
0.476, 0.435, 0.417, 0.400, 0.385

3vii Slope, = Δv^-1/ΔR-1
= 0.5 - 0.355/0.6 - 0
= 0.145/0.6
S = 0.242

Intercept, C = 0.355v^-1

(3aviii)
K = S/C
K = 0.242/0.355
K = 0.68

(3ix)
(i) I ensured tight connections.
(ii) I ensured clean terminals.

(3bi)
(i) Temperature of wire
(ii) Cross sectional area of wire
(iii) Length of wire
(iv) Nature of wire

(3bii)
Draw the diagram

Effective E.m.f = 2v(parallel connection)
Effective internal resistance
= r * r/r + r = r/2ohms

Current, I , 0.8A
External resistance R = 2A
Using,
E = I(R+r)
2 = 0.8(2+r/2)
2.5 = (2+r/2)
2.5 - 2 = r/2
0.5 = r/2
r = 0.5*2 = 1ohms

Tuesday 5th June 2018
Practical � Physics � 10:00am � 12:45pm

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2018 Neco Physics Practical Questions and Answers is available ,all you need to do is to follow the instructions above, get verified Physics Practical Questions and Answers here, question and answers are now Available. expo for Neco 2018 Physics Practical, exam runs for Physics Practical Questions and Answers

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2018 Neco Physics Practical Questions and Answers is available ,all you need to do is to follow the instructions above, get verified Physics Practical Questions and Answers here, question and answers are now Available. expo for Neco 2018 Physics Practical, exam runs for Physics Practical Questions and Answers

Last edited by Emmi on Tue Jun 05, 2018 10:18 am; edited 2 times in total
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