Pass Physics GCE Objective, Essay and Practicals See Questions Here

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This is WAEC GCE Physics Questions 2018 and OBJ and Theory Answers. All student as a matter of fact, can now Pass Physics GCE Objective, Essay and Practicals See Questions Here – Physics, Physics WAEC Questions 2018, waec gce 2097 physics questions, 2018 waec physics questions and answers, 2018 waec answers, waec 2017 physics theory question, gce past questions on physics, waec gce physics 2018, 2017 waec gce questions, waec physics question 2018.

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Pass Physics GCE Objective, Essay and Practicals See Questions Here

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.

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

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

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

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

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

Pass Physics GCE Objective, Essay and Practicals See Questions Here

(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

9bii) rain
wind
Sunlight
Geothermal

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

(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
====================================

Pass Physics GCE Objective, Essay and Practicals See Questions Here

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.

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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

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

Pass Physics GCE Objective, Essay and Practicals See Questions Here

(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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Pass Physics GCE Objective, Essay and Practicals See Questions Here

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.

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