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4)
Given flux density(=0.217
Force(F)=9.610^-12N
Speed(v)=?
F=Bqv
9.610^-12= 0.12* 1.6* V V=
(9.610^-12)/0.19210^-19
=5010^-12 9
v=5010^7
=510^8ms^-1
==============================
==
2) Velocity(u)=20ms^-1
Angle(tita)=40 degree
At maximum height, h
V^2=u^2 2gh
U^2 sin^2 tita u
u= 20^2 (sin 40 degree)^2 u=20^2
(sin 4o degree)
u=400 0.3455
u=138.2ms^-1
(Note: This symbols ^ means Raise to
power)
5)
i) For launching astronauts into the
space
ii) For launching satellite
iii) For Scientific research
==============================
==
6a)
Doping is the addition of small quantity
of an element
to a semi conductor to change its
characteristics
6b)
Doping introduce impurities into an
extremely pure instrintic semi
conductor for the purpose of
modulating its elctrical properties
==============================
==
7)
X = Electron gun
Y = Accelerating mode Z = Deflection
plate
==============================
==
3)
-smoke
-aerosol
-dust particle
==============================
==
1a)
impulse(I)=Ft
F=ma= m(v/t)= M((d/t)/(t))
f=M(l/T)/T)= MLT^-2
I=MLT^-2 * T I=MLT^-1
1b)
Acceleration(a)=v/t=(d/t)/t
a=d/t^2= L/T^2= LT^-2
1c)
WOrk(w)=fd W=MLT^-2 * L
W=ML^2T^-2

9a)
i)Foundamental interval: is the value
arbitrarily assigned to the difference in
temperature between two fixed points
(such as the ice point and steam point)
on a temperature scale, in order to
define the scale.
ii)Thermal equilibrium: is a higher
temperature object which is in contact
with
a lower temperature object that
transfers heat to the lower
temperature
object. The objects will approach the
same temperature, and in the
absence of loss to other objects, they
will then maintain a constant
temperature.
b) Uses of hydraulic press:
� It is used in metal forming operations
� For moulding
ii) 8a) Net force: The net force is the
vector sum of all the forces that act
upon an object. It is also the sum of all
the forces, taking into account the fact
that a force is a vector and two forces
of equal magnitude and opposite
direction will cancel each other out.
8b)
The law of conservation of linear
momentum states that the total
momentum of a system of particles
remains constant, so long as no
external forces act on the system. e.g
Firing a bullet from a gun or a
radioactive nucleus spontaneously
emitting an alpha particle.
8c)
M = 200g = 0.2kg, h= 2cm, h2= 1.8m, u
= 0, v=?
P.E = mgh
P.E = K.E = 1/2MV^2
4 = 1/2 x 0.2 x V^2
V = ?40 = 6.32m/s^-1 Impulse = M(V-U)
Impulse = 0.2 ( 6.32 - (-o))
= 1.264Kgms^-1 8d)
M= 0.02kg , f= 5Hz, x= 10cm = 0.1 , V =
200cm =
2m/s 8dii)
r = ? , w = 2?f = 2x3.142x5
W= 31.4
From V= w ?r^2 - 0.1^2
2 = 31.4 ? r^2 - 0.1^2
= r^2 - 0.1^2 = 0.6369^2 r^2 =
0.41564161
r = ? 0.41564161
r = 0.64m Maximum vel
V = wr (x = 0 at maximum)
9a)
i)Foundamental interval: is the value
arbitrarily
assigned to the difference in
temperature
between two fixed points (such as the
ice point
and steam point) on a temperature
scale, in
order to define the scale.
ii)Thermal equilibrium: is a higher
temperature
object which is in contact with
a lower temperature object that
transfers heat
to the lower temperature
object. The objects will approach the
same
temperature, and in the absence of loss
to other objects, they will then
maintain a constant
temperature.
9b) Uses of hydraulic press:
- It is used in metal forming operations
- For moulding
9c)
magnet
9di)
by using calometry law
heat last = heat gain
MmCmD?m=CaD? + Mw Cw D?
300 * Cm * ( 85 - 40 ) = 90 + 500
4200
13500Cm = 90 + 29400000 13500CM =
29400090/13500
Cm=2177.78Jg^-K^-1
9dii) �
i) by convection
ii) by conduction 9diii) �
i) power generation
ii) chemical processing
10a)
Critical angle is the angle of incidence
in the
optically densed medium when the
angle of refraction is 90degrees
10b)
Anti-note are created by region of
maximum
displacement in a wave
11a)
Dielectric strength is the property of an
insulating material to retain material to
retain
electrical properties
11bi)
-Infra-red wave
-Geiger muller counter
-Scintillation counter
11bii)
Irradiation of solar energy
11c)
Charge(q)=1.010^-19C
Electric field intensity(E)=1200NC^-1
Weight of the oil drop=?
E=F/q
1200=F/1.010^-19
F=12001.010^-19
F=1.210^310^-19
F=1.210^-16N 11d)
R=100ohm, L=0.05H, C=0.25uF
V=220v, f=50Hz
11di)
Impedance(z)=sqroot(R^2+(Xl-Xc)^2)
Xl=2piefl
Xl=2(22/7)500.05
Xl=15.71ohm
Xl=(1/2piefc) Xc=1/78.5510^-6
Xc=10^6/78.55
=12730.7ohm
Z=sqroot(100^2+(15.71^2-12730.7^2)
Z=sqroot(10000+2.6310^16
Z=sqroot(2.6310^16)
Z=1.6210^16ohm
11dii)
Vrms=IZ
I=220/1.6210^16
=1.36*10^-14

Thank's for read our article WAEC 2016/2017 PHYSICS QUESTIONS AND ANSWERS
Created at 2016-04-12 09:47:01
Tags: 2016 , 2017 , answers , physics , questions , Waec

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