2019 NECO Physics Essay & Obj Question Answer – June/July Expo

NECO 2019 Physics Essay and Objectives Answer – June/July Expo
NECO 2019 Physics Essay and Objectives ANSWER

100% Correct and Verified NECO 2019 Physics Essay/Theory and Obj Answer for candidate in Nigeria

NECO Physics Obj


NECO Physics Essay/Theory

Note; You Are Advice To Answer Question One (1) And Any Other Five (5) From Section A (Part I) And Four (4) From Section B. Enjoy!


Answers-Six(6) From This Section.

(pick 2)
(i) Solar Electric Power Generation
(ii) Solar Cooking
(iii) Solar Thermal Power Production
(iv) Solar-distillation

Natural sattelite is a celestial body in space that orbits a larger body, such as Moon Which moves around the Earth.
Artificial satellite is a machine of human creation that is sent to the space or the orbit of the Earth for the collection of data, communication and other ends

The applicable relationship is Ns/Np = Vs/Vp meaning the ratio of secondary voltage to primary voltage is equal to the ratio of secondary turns to primary turns
Ns = 200turns , Vs = 300V , Np = ? , Vp= 60V
Np= 200 × (60/300)
Np = 200 × 0.2
Np= 40 turns

Force is an agent that changes or tends to change the state of rest or of uniform motion in a straight line of a body

Contact force are forces which are in contact with the body to which they are applies while Field force are those forces whose sources do not require contact with the body to which the are applied

Maximum range (R) : Maximum range is defined as when the angle of the projection (Φ) is equal to 45° ie R = U^2sin90/g and Φ=45°
R= U^2sin90/g and sin90=1

(i) Stable Equilibrium – A cone resting on its base
(ii) Unstable Equilibrium – A cone resting on its apex or vertex

It means that the glycerine which is in solid state will require a heat of 13°c to change to liquid state

The S.I unit of mass is in kilogram (kg) while that of weight is in Newton (N)

Constructive interference is formed when the wave amplitudes reinforce each other, building a wave of even greater amplitude. Destructive interference is formed when the wave amplitudes oppose each other, resulting in waves of reduced amplitude.


Faraday’s law states that the induced e.m.f. in a conducting circuit is directly proportional to the rate of change of magnetic flux linkage, Φ, with the circuit.

(i)Induction motors
(ii)Electric generators

Electric field acts on charges (Q) while Gravitational field acts on masses (m)

Emf =12v
r =0.45Ω
R =5.0Ω
I =?
I =Emf/R+r
I =12/5+0.45=12/5.45
I =2.20A

(Pick Only 1)
(i)it is used in generating heat energy required to generate electricity
(ii)it can be operated non-stop with the same nuclear capacity

(Pick Only 2)
(i)the plant set up is capital intensive
(ii)principal raw material (uranuim) is not easily available.
(iii)Careless exposure to raw material affects the cell tissues due to radiation effect.

Answers-Four(4) From This Section.

Centripetal force and centrifugal force


Achimede’s principle states that when a body is totally or partially immersed in a fluid, it experience an upthrust which is equal to the weight of the fluid displaced.

eo = 4×10^4 kg/m^3
Mo = 0.4kg
Vo = ?
eL = 1.2×10^2 kg/m^3
eo = Density of object
Mo = mass of object
Vo = volume of object
eo = Mo/Vo
Vo = Mo/eo = 0.4/4×10^4
Vo = 0.00001m^3
Mo in the liquid = eL × Vo
= 1.2×10^2 × Vo × 3/4
= (1.2×10^2 × 0.00001×3)/4
= 0.0009kg
= 9×10^-4 kg
Reading of the spring = 9×10^-4 ×10 = 9×10^-3 N

Examples of Renewable energy are :
(i) solar energy
(ii) Wind energy

Radius of the wheel = B
Radius of the axle = O
V. R= Distance moved by effort/ Distance moved by load
Effort moves through a distance is equal to the circumference of the wheel 2πB and at the same time interval the load moves through the axle 2πD
V.R=2πB/2πD =B/D

It breaks because ice is less dense than water and water expands when it is frozen

Evaporation takes place at all temperature but boiling takes place at a particular temperature (100°c)

u1 = 16.7m/s
V2 = 0.5m/s
m2 = 200kg
m1u1 + m2V2 = (m1+m2)V
200×16.7 + 200×0.5 = (200+200)V
V = 3340+100/400 = 3440/400

A wave is a disturbance which travels through a medium transferring energy from one point to another without causing any permanent displacement of the medium

– Light wave
(i) It is an electromagnetic wave
(ii) It can be polarized

– Sound wave
(i) It is a mechanical wave
(ii) It can can not be polarized

Long sight ( hypermetropia ) can be corrected with converging lens

F= 440Hz
L1= 18.8cm
L2= 57.8cm

At resonance L+c= λ/4
Where C is the end correction. Assuming the end correction C is negligible,then
L1= λ/4
4 × 18.8 = λ

First position L1=λ
Second position L2 =λ
Hence, L2-L1 = λ/4
V= fλ or f=V/λ
V = 2f(L2-L1)
V= 2×440( 0.5733 – 0.188)
V= 880(0.385)

Overtime = 5λ/4
= 3.76/4
= 0.94m or 94cm

Electric field intensity is the measure of intensity or strength of electrical force per unit charge at any given point in the electric field. It is denoted by the letter E and its Unit is Newton per Coulomb (N/C). Where
F is force (N)
Q is Change (C)

A lead accumulator in charged by passing direct current (d.c) through it in the opposite direction to that which its supplies. The positive terminal of the d.c is connected to the positive terminal of the lead accumulator and the negative terminal of the d.c is connected to the negative terminal of the accumulator.

Electrolyte in battery os a solution of SO⁴ and H²O and over time can be lost by slight spills and evaporation and using distilled water it is free from additional minerals that can be find in tap water and these minerals can significantly decrease in life of batteries

Faraday’s law of electrolysis ; that the chemical deposition due to the flow of current through an electrolyte is directly proportional to the quantity of electricity (coulombs) passed through it. i.e. mass of chemical deposition.

Area = 50cm² => 5*10-³ M²
I = 7A
t = 45*60(s)
T = thickness
M = z i t
m = 3.3 *10^-7 *7845*60
=>6.237 * 10-³ kg
8.9 * 10³kg/m³ = 6.237 * 10-³/V
V = 6.237 * 10-³/8.9 * 10³
=> 7.008*10 -> m³
Thickness = volume/area
=> 1.40*10-⁴m

Binding energy is the minimum energy or work required to separate the nucleons of an atom

(i)it is used in medicine as a radiotherapy
(ii)it is used in industry to study the defects in metals and welded joints

The intensity of x- ray can be increased in x- ray tube by increasing the voltage which results to an increase intensity of an electron

(i)both are electromagnetic waves
(ii) Both are high energy photography

W= hfo
2.25*10^-19 = 6.6 *10^34fo
fo= 2.25*10 ^-19/6.6*10^-34
= 2.25/6.6 *10 ^-19 +34

Max energy liberated = E=hc/λ – W
= (6.6×10^-34 × 3×10^8/3.0×10^-7) – 2.28×10^-19
(6.6×10^-19) – (2.25×10^-19)
= 4.35×10^-19 J







NECO ssce 2019 Physics Theory expo answers, Ssce 2019 Physics Expo answers now available, nov/dec Physics Answers for 2019, Physics Questions NECO Ssce Expo Answers Here, Free wassce Physics Theory objective, essay & theory correct Expo 2019 answers Runz NECO Physics Theory, NECO Ssce 2019 Free Physics Theory essay, Theory Questions and Answers Expo for NECO Physics Theory Paper 1 and Paper 2 Theory Questions and Answers Expo Now Posted, Free Physics Theory objective ans for internal ssce, see NECO ssce expo Physics , essay questions for free, loadedexpo correct wassce Physics ans, sure NECO ssce Physics Theory objective answers runz runs expo free real and correct NECO ssce 2019 nov/dec Physics Theory free expo runz runs ans answers online for free see free answers online, 2019 Verified NECO Free Ssce Physics Answers have been posted REAL NECO SSCE Physics Theory QUESTIONS & ANSWERS Direct To Phone Number AS Text message, RE: 2019 WASSCE Physics Theory (Expo) NECO 2019 certified runs Physics Theory questions and answers NECO SSCE November/December 2019 Physics / ESSAY / OBJ QUESTION AND EXPO I need NECO ssce free expo site, how can I get NECO Physics Theory answer for free, NECO 2019 Physics Theory essay, Objective And Theory Question and Answer Now Posted, Real 2019/2019 nov/dec wassce NECO Physics Theory objective, essay and theory 100% correct expo questions and answers runz chokes runs, verified 2019 NECO Physics , essay and obj NECO Physics Theory expo website, NECO ssce Physics Theory live cheats, sure November/December NECO SSCE 2019 Physics Theory original objective, theory and essay questions and answer now available here, 100% NECO ssce Physics Theory expo, 2019 wassce Physics Theory obj, essay and theory runz now posted, correct NECO ssce Physics Theory objective, essay (theory) answer now ready, free 2019 wassce Physics Theory obj, theory and essay best expo site NECO ssce Physics Theory questions and answers, password for certified NECO ssce Physics Theory essay theory obj expo, how to get/ where to get wassce Physics, Expospy NECO Physics Theory, 042tvseries neco 2019 Physics theory, examrelief neco Physics theory answer, neco2019 042tvseries NECO Physics theory answer, school.naijagreen neco Physics theory answer 2019, wakagist neco 2019 Physics theory answer, earboard Physics theory answer, naijaexam neco Physics theory answer, essay and objective expo answer direct to my phone as text message, trusted NECO ssce Physics Theory questions and answer, i need NECO Ssce nov/dec Physics Theory essay theory objective obj Expo 2019 answers on whatsapp, gidifans Physics Theory answer, solutionclass Physics Theory answer, 042tvseries Physics Theory answer, codedexam NECO Physics Theory answer, wapbaze Physics Theory answer, wapextra Physics Theory expo, Martinlibrary Physics Theory expo, examgists NECO Physics Theory expo, NECO Physics Theory objectives answer, naija NECO Physics Theory expo free answer.

Be the first to comment

Leave a Reply

Your email address will not be published.