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Waec Gce Physics 2017 Questions & Answers Objectives Theory & Essay Expo/Runz/Site
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Subjects for Thursday, 14th September, 2017
Physics 2 (Essay) >> 9.30am – 11.00am
Physics 1 (Objective) >> 11.00am – 12.15pm
Geography 3 (Practical and Physical Geography) >> 2.00pm – 3.50pm
Physics 1 (Objective) >> 11.00am – 12.15pm
Geography 3 (Practical and Physical Geography) >> 2.00pm – 3.50pm
Time for Exam
Physics 2 (Essay) >> 9.30am – 11.00am
Physics 1 (Objective) >> 11.00am – 12.15pm
Geography 3 (Practical and Physical Geography) >> 2.00pm – 3.50pm
Physics 1 (Objective) >> 11.00am – 12.15pm
Geography 3 (Practical and Physical Geography) >> 2.00pm – 3.50pm
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Verified Waec Gce Physics 2017 Questions & Answers Objectives Theory & Essay
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Physics OBJ:
1ADDCCCDDCA
11BDCACBCCAD
21BBDCBBAADC
31ABABACACBD
41ABCDCBDACD
==================
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
=================
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
==============
2)
i) The position of the ion of the atom of the element in the electrochemical(activity)series.
ii) the nature of the electrode.
iii) the concentration of the electrolyte
=================
(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.
=================
10a)
Sound Waves
i)Require a medium.
ii)Travel with a speed of 332 m/s at 0 C.
iii)Are longitudinal waves consisting of compressions and rarefactions.
Light Waves
i)Do not require a medium
ii)Travel with a speed of 3 *10 8 m/s.
iii)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
==============
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
=================
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
=================
4a)
i)They are used in the fields of communications
4b)
ii)warfare
ii)in exploring space
==================
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.
9bi) Renewable energy is energy generated from natural resources—such as sunlight, wind, rain, tides and geothermal
9bii)
rain
wind
Sunlight
Geothermal
==================
(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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Verified Waec Gce Physics 2017 Questions & Answers Objectives Theory & Essay
NOTICE !!!! This is our only official number => 08138084871
NOTICE !!!! This is our only official number => 08138084871
Physics OBJ:
1ADDCCCDDCA
11BDCACBCCAD
21BBDCBBAADC
31ABABACACBD
41ABCDCBDACD
==================
1ADDCCCDDCA
11BDCACBCCAD
21BBDCBBAADC
31ABABACACBD
41ABCDCBDACD
==================
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
=================
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
=================
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
==============
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
==============
2)
i) The position of the ion of the atom of the element in the electrochemical(activity)series.
ii) the nature of the electrode.
iii) the concentration of the electrolyte
=================
i) The position of the ion of the atom of the element in the electrochemical(activity)series.
ii) the nature of the electrode.
iii) the concentration of the electrolyte
=================
(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.
=================
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.
=================
10a)
Sound Waves
i)Require a medium.
ii)Travel with a speed of 332 m/s at 0 C.
iii)Are longitudinal waves consisting of compressions and rarefactions.
Sound Waves
i)Require a medium.
ii)Travel with a speed of 332 m/s at 0 C.
iii)Are longitudinal waves consisting of compressions and rarefactions.
Light Waves
i)Do not require a medium
ii)Travel with a speed of 3 *10 8 m/s.
iii)Are electromagnetic waves consisting of varying electric and magnetic fields.
i)Do not require a medium
ii)Travel with a speed of 3 *10 8 m/s.
iii)Are electromagnetic waves consisting of varying electric and magnetic fields.
10bi)
DRAW THE DIAGRAM
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
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
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
u=36m=3600cm
hi=2.5cm
v=0.30cm
i)m=v/u
m=0.3/3600
m=0.000083
m=0.3/3600
m=0.000083
ii)m=hi/ho
ho=hi/m
ho=2.5/0.000083
ho=30120cm
ho=301.2m
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
==============
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
==============
PLEASE USE THIS NO.11 IS MORE ACCURATE
11a)
-Number of turns in the coil
-Area of coil
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
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
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
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
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
Io=40amp
11diii)
Ir.m.s=Io/sqroot2
=40/sqroot2 Ir.m.s=28.3amp
=================
Ir.m.s=Io/sqroot2
=40/sqroot2 Ir.m.s=28.3amp
=================
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
=================
Applications of permanent magnet:
i) in telephone earpiece
ii) in electrical bell
iii) in generators
iv) in electrical motors
v) in induction coil systems
=================
4a)
i)They are used in the fields of communications
4b)
ii)warfare
ii)in exploring space
==================
i)They are used in the fields of communications
4b)
ii)warfare
ii)in exploring space
==================
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.
9bi) Renewable energy is energy generated from natural resources—such as sunlight, wind, rain, tides and geothermal
9bii)
rain
wind
Sunlight
Geothermal
==================
rain
wind
Sunlight
Geothermal
==================
(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.
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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