WAEC Physics Questions 2022 and Answers to OBJ & Theory Questions

Filed in Exam, Past Questions, WAEC News by on February 2, 2022

 – WAEC Physics Questions 2021

The WAEC physics questions 2022 Expo Questions are out now on our website. In this article, I will show you past WAEC Physics random repeated questions for free. You will also understand how WAEC Physics’ questions are set and many more examination details. All you need to do is to stay focused and follow this guide.

waec physics questions 2022

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 African countries.

In a year, over three million candidates registered for the exams coordinated by WAEC.

WAEC Physics Questions And Answers 

The WAEC physics examination is scheduled to hold on the 15th of September 2021. It is not news that we post free questions and answers.

Please Make sure you keep refreshing this page at every minute. We are verifying the WAEC 2021 physics questions and answers.

PHYSICS OBJ:
1-10: AAABACCDDB
11-20: ACCDCBCBAC
21-30: CCCBBDDBBB
31-40: ACBBCCCAAD
41-50: ABADCCBAAC

Today’s WAEC English OBJ Answers: (2021 Answers)

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Theory WAEC Questions for Physics

(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 in solar panels for 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 radius
– The angle between the force and the lever arm

(7bi)
Free fall simply means the act of which are objects fall freely under the influence of gravitational force. An object under 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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