WAEC Physics Questions and Answers: We will gladly provide you with free access to previous WAEC Physics problems in this article. Along with many other exam-related data, you will comprehend how the WAEC Physics questions are structured. All you have to do is stay concentrated and adhere to my advice. The West African Senior School Certificate Examination, for University and Jamb admission examinations in West African nations, is conducted by the West African Examinations Council (WAEC). More than three million applicants applied for the WAEC-organized tests in a single year.

## WAEC Physics Questions and Answers: Objective

PHYSICS OBJ:
1-10: AAABACCDDB
11-20: ACCDCBCBAC
21-30: CCCBBDDBBB

(1)
Original length Lo= 3m
Extension e = 310 = 3*3= 9m

F×e
F=ke where k = 982.3NM-²
F=982.3*9=8,840.7N

The five that produce the extension F = 8.840.7N

(2a)
Flat metal plates are mainly used to collect heat for space heating infor heat transfer.

(2b)
They used a thermal insulator for the reduction of heat transfer between objects in thermal contact

(2c)
The tube is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied.

(3a)
highly purified silica glass.

(3b)
To confine the optical signal in the core the refractive index of the core must be greater than that of the cladding.

(4)
Escape velocity = VE
The radius of the earth = R

Acceleration because of gravity = 10ms²
Escape velocity Be=√2R

VE=√2*10R
VE=√20R

(5)
The angle at horizontal θ = 30°
Time of light, T = 25sec

The velocity of projection u =?
But T=2using sinθ/g

25= 2u*sin30/10
25=0.5u/5

0.5u=125
U=125/0.5 =250ms-¹

(6)
(i)Coherence

(ii)Directionality
(iii)Monochromatic

(7ai)
Torque is defined as a measure of the force that can cause an object to rotate about an axis

WAEC Physics Questions 2021 and Answers
(7aii)

Factors that determine torque are;
– The magnitude of the force

– The angle between the force and the lever arm

(7bi)
Free fall simply means the act in which objects fall freely under the influence of gravitational force. An object in free fall does not encounter air resistance.

(7bii)
Height of tower H = 40.0m
Velocity v = 10.0m/s, time t=?, g=10.0m/s

Using the relation
S= ut + 1/2gt^2

H= ut + 1/2gt^2
40= 10t + 1/2*10t^2
4= t + t^2/2

= t^2 + 2t – 8=0 ( solving quadratically)
= (t+4)(t-2)=0

t+4=0 or t-2=0
t= -4 or t=2

Therefore, time to fall on the ground t=2s

(7c)
R.d of oil =R1 = 0.72 R.d of water = R2=1.00 R.d of liquid= R1/R2= 0.72/1 = 0.72

R.d = density of wood(P1)/density of water(P2)
0.72=P1/1.00

P1= 0.72*1.00=0.72g/cm³
But the density of wood= mass of wood/volume of wood

0.72= mass of wood/8*8*8
Mass of wood = 0.72*512 = 368.64g

DISCLAIMER! These are not real WAEC Physics questions, but likely repeated questions over the years to help candidates understand the nature of their examinations. Ensure to note every question provided on this page.

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