Latest WAEC GCE Physics Questions 2018 and OBJ and Theory Answers

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Latest WAEC GCE Physics Questions 2018 and OBJ and Theory Answers 

WAEC GCE Physics Questions 2018 and OBJ and Theory Answers – Latest WAEC GCE Physics Questions 2018 and OBJ and Theory Answers – WAEC Physics Questions and answers 2018 [Objective & Theory] | Science Specimen 2018 | Check WAEC physics – WAEC 2018 Physics Questions and answers Practical Specimen Released – Physics Questions and answers Specimen & Practicals 2018 | WAEC Practical – WAEC GCE Physics Questions and answers Science Practical Specimen 2017 | physics – Physics Questions and answers – Waec – WAEC Physics Questions and answers SOLUTION – Examloaded – WAEC GCE 2018 Physics Questions and answers (physics Practical) Specimens – 2018 JAN/FEB WAEC GCE Physics Questions and answers Practical Answers/Expo/Dubs/Runz – WASSCE / WAEC Physics Questions and answers Science (physics) Past Questions – 2018 Waec Questions And Answers/Expo & Runz.

Physics, Physics WAEC Questions 2018 | In this article, I will be showing you past Physics objective and theory random repeated questions for free. You will also understand how WAEC Physics questions are set and many other examination guides. Stay focus and read through.

WAEC GCE Physics Questions 2018

The West African Examinations Council (WAEC) is an examination board that conducts the West African Senior School Certificate Examination, for University and Jamb entry examination in West Africa countries. … In a year, over three million candidates registered for the exams coordinated by WAEC.

Latest WAEC GCE Physics Questions 2018 and OBJ and Theory Answers

Latest WAEC GCE Physics Questions 2018 and OBJ and Theory Answers

PHYSICS OBJ:
1-10: ADDCCCDBCA
11-20: DDCADBBCAB
21-30: BBDCDBABDC
31-40: ABABDDDDBD
41-50: AACDABD

1)
Velocity of projection U_p =10m/s
T= sqr root 2h/g Where H=1
G=10
T=sqr root 2*1/10
=sqr root 0.2
=0.447s
V=UsinTita + gt V=10sin90 + 10*0.447
V=10 +4.45
V=14.5m/s
=================

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(2)
(i) The position of the ion of the atm of the element in the
electrochemical(activity)series.
(ii) the nature of the electrode.
(iii) the concentration of the electrolyte
====================================
3)
l=6.5m
d=3.0mm=0.003m
e=0.20mm=0.0002m
F=60N
stress=F/A
A=pie*D^2/4
=3.142*0.003^2/4
=3.142*9*10^-6/4
=7.065*10^-6/4m^2
stress=60/7.065*10^-6
=8.49*N/m^2
==============

=====================================
(7)
Doping of semiconductor increases the number of holes and electrons in
the semiconductor,thereby making it impure whch makes it to be useful
or active.
=====================

PLEASE USE THIS NO.11 IS MORE ACCURATE

11a)
-Number of turns in the coil
-Area of coil

11b)
Farad is a capacitor of a unit charge when
a unit of voltage drop is applied

11ci)
The brightness of the bulb remains the
same since the same current will flow
through them

11cii)
a)The resistor should be connected in
parallel with the galvanometer

b)VR=Vg
I*R=0.05I*Rg
IR=0.05I*100
IR=5I
R=5I/I
R=5ohm

11di)
I=40sin5w(pie)t
but I=Iosin2(pie)ft
therefore 2(pie)ft=500(pie)t
2f=500
f=500/2 f=250Hz

11dii)
Io=40amp

11diii)
Ir.m.s=Io/sqroot2
=40/sqroot2 Ir.m.s=28.3amp
=================

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

(4a)
(i) Satelite is used in communication.
(4b)
(i) Rockets are used for research of the planetary bodies.
(ii) They are also used in making adventures. They are used in launching
of satelites.

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

(5) Applications of permanent magnet:
(i) in telephone earpiece
(ii) in electrical bell
(iii) in generators
(iv) in electrical motors
(v) in induction coil systems

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

9 )Boyle’s law state that a law stating that the pressure of a given mass
of an ideal gas is inversely proportional to its
volume at a constant temperature.

9 bi) Renewable energy is energy generated from
natural resources—such as sunlight, wind, rain,
tides and geothermal.They are energy sources that can be replaced as
they are used.They are continually replenished

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9bii) rain
wind
Sunlight
Geothermal

10 a)
Sound Waves
1. Require a medium.
2. Travel with a speed of 332 m/s at 0 C.
3. Are longitudinal waves consisting of
compressions and rarefactions.

Light Waves
1. Do not require a medium
2. Travel with a speed of 3 *10 8 m/s.
3. Are electromagnetic waves consisting of
varying electric and magnetic fields.

10bi)
DRAW THE DIAGRAM

10bii)
Nature=>It is a real image and inverted
Position=>It is at 2f on the other side
Size=>It has the same size of the object

10c)
Because the light ray travel on a straight line ie rectilinear propagation of
light rays

10d)
u=36m=3600cm
hi=2.5cm
v=0.30cm
i)m=v/u
m=0.3/3600
m=0.000083

ii)m=hi/ho
ho=hi/m
ho=2.5/0.000083
ho=30120cm
ho=301.2m

iii)
1/f=1/u+1/v
1/f=1/3600+1/0.3
1/f=0.00028+3.33333
1/f=3.33361
f=0.3cm

================================
(12ai) Decay constant is defined as the instantaneous rate of decay per
unit atom of a substance.

(12aii)
Halflife ,T=0.693/decay contant. Hence, decay constant,llamda =0.693/T ;
=0.693/3days; =0.182day-1 i.e per day.

(12bi) the moderator of a nuclear fission reactor is made up of graphite.
Its function is that slow down the movement of a neutron,so that the
chain reaction will not dry out.

(12bii) the control rods is made of Boron steel.its function is to ensure
movement of the floor,so that it can shut off the reactor automatically in
case of electrical failure

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

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