Login Register


« | »


WAEC GCE/PRIVATE WAEC PHYSIC Answer page.


Waec GCE/PRIVATE Waec
Monday, 22nd February, 2021
Physics 2 (Essay)

Physics 1 (Objective)

9:30am – 11:00am

11:00am – 12:15pm

Physics 3 (Alternative to Practical Work)

Waec GCE physics

1a Projectile motion is a form of motion experienced by an object or particle that is projected near the Earth’s surface and moves along a curved path under the action of gravity only. This curved path was shown by Galileo to be a parabola, but may also be a line in the special case when it is thrown directly upwards

1b Airplanes, guided missiles, and rocket-propelled spacecraft are sometimes also said to follow a trajectory. Since these devices are acted upon by the lift of wings and the thrust of engines in addition to the force of gravity, they are not really projectiles.

2a The proportional limit is the point on a stress-strain curve where the linear, elastic deformation region transitions into a non-linear, plastic deformation region. In other words, the proportional limit determines the greatest stress that is directly proportional to strain.

b The yield point of a material occurs when the material transitions from elastic behavior – where removing the applied load will return the material to its original shape – to plastic behavior, where deformation is permanent

2a) Yield point is the point beyond the elastic limit in which the elastic material has yielded all its elasticity permanently and has become plastic

Number (1a)

Projectile motion: is a form of motion experienced by an object or particle that is projected near the Earth’s surface and moves along a curved path under the action of gravity only.

1b A flying plan is not considered as a projectile because it not influence by the force of gravity

2a) Yield point is the point beyond the elastic limit in which the elastic material has yielded all its elasticity permanently and has become plastic

Number (1a)

Projectile motion: is a form of motion experienced by an object or particle that is projected near the Earth’s surface and moves along a curved path under the action of gravity only.

WAEC GCE

(5a)
[Pickone]

(5b)
[Pick any two]
(i) in scrap yards to lift magnetic materials such as iron and steel

(ii) to separate magnetic materials such as iron and steel from non-magnetic materials

(iii) in relay switches and door locks that can be controlled remotely

(iv) to hold open fire doors – the electromagnet switches off when a fire alarm is sounded and the doors close.

(3)
e=0.2cm
w=200J
k=?
w=1/2ke²
200=1/2 x k x(0.2/100)²
k=200/2×10^-6
k=10^8N/m

(4a)
The principle of transmitting signals in optic fibers is the principle of total reflection at the receiving end, after receiving the optical signal, the detector converts it to an electrical signal, and after demodulation restores the original information.

(4b)
(i) greater bandwidth than that of copper cable
(ii) faster speed
(iii) longer distance

(9ai)

(9aii)
Check the image below

(9b)

(9ci)
Land is a good conductor heat , with low heat capacity as a result , warm air warm air or heated air rises and blows towards the sea while cooler breeze blows land , this occurs during the day

(9cii)

(8aii)
Relative velocity= Velocity A – Velocity B
= 120km/hr – 42km/hr
= 78km/hr

(8bi) diagram above

(8c)
(i) DNA extraction
(ii) proton extraction
(iii) extraction of blood cells

(8d)
m= 17kg
L= 3.4m
w= 17N
w=mg
w= 17 x 10
w= 170N
F= mv²/r
300= 17 x v²/3.4
1020= 17 x v²
v²= 1020/17
v=√60
v= 7.75m/s

Physics OBJ

PHYSICS-OBJ
01-10 BDCABDABDD
11-20 DAACAACBAB
21-30 BCAABAAABA
31-40 DACBCCCDDC
41-50 DBABBDDCCD

Answers loading………..

Keep refreshing this page

Gamvibes is the best blogging website for your exam runz/exam expo


No Responses Yet

Leave a Reply


NOTE:- After Dropping Comment Wait A While, Your Comment Will Appear After Moderation!!

« | »


Let's help you find!







Gamvibes is a Nigeria Online Public Site, Where Students Meet To Discuss and Gain Experience In All Educational Aspect.




Copyright 2021 Gamvibes Services.
Developed by Dave

%d bloggers like this: