2023 WAEC Physics (OBJ & Essay) Questions and Answers

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Waec 2020/2021  physic Obj And Theory/Essay questions answers is out

COMPLETE 2023 WAEC PHYSICS (OBJ & ESSAY) QUESTIONS AND ANSWERS 


Tuesday, 23rd May, 2023

Physics 2 (Essay)

 – 2:00pm – 3:30pm

Physics 1 (Objective) 

– 3:30pm – 4:45pm.

2023 WAEC PHYSICS OBJECTIVES (OBJ) ANSWERS

Objective Questions

1. The wavelength of an electromagnetic wave is proportional to 

A. Its frequency 

B. Its speed 

C. Its amplitude 

D. Its energy 

Answer: A. Its frequency 

2. The power of a lens is measured in 

A. Diopters 

B. Watt 

C. Ampere 

D. Joule 

Answer: A. Diopters 

3. The direction of the electric field at a point in space around a charged particle is

A. Always zero 

B. Always directed away from the particle 

C. Always directed towards the particle 

D. Sometimes zero and sometimes directed away from the particle 

Answer: C. Always directed towards the particle 

4. The total energy of a system of two particles of masses m1 and m2 and moving with velocities u1 and u2 is

A. m1u1 + m2u2 

B. m1u1 – m2u2 

C. m1u1/m2u2 

D. m1u2/m2u1 

Answer: A. m1u1 + m2u2 


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2023 WAEC PHYSICS ESSAY OR THEORY ANSWERS:

Essay Questions

1. What factors affect the speed of light?

The speed of light in a vacuum is constant and is the same for all observers, regardless of the source of light or the motion of the source. However, the speed of light is affected by certain factors such as the medium through which it is travelling, the temperature of the medium, and the presence of a magnetic field. 

When travelling through a medium other than a vacuum, the speed of light is reduced due to interactions with the particles that make up the medium. The temperature of the medium can also affect the speed of light, as the thermal motion of the particles in the medium can scatter the light, further reducing its speed. 

In the presence of a magnetic field, the speed of light is also reduced due to the Lorentz force, which causes the light to be deflected by the magnetic field. As the strength of the magnetic field increases, the speed of light decreases. 

Overall, the speed of light is affected by factors such as the medium it is travelling through, the temperature of the medium, and the presence of a magnetic field.


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2023 WAEC PHYSICS (OBJ & ESSAY) QUESTIONS AND ANSWERS 

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2023 WAEC PHYSICS OBJ ANSWERS


2022 WAEC PHYSICS OBJ ANSWERS

0–10: BCABBDDACA

13: CABCBDBDBD

22–30: ABCCBBAADA

31 to 40 - BCDBCBACDA

39-41: DACBDDDBAA

STILL SOLVING..................


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WAEC Physics Theory/Essay Answers


  (2a)
Flat metal plate are mainly used to collect heat for space heating in solar panels for heat transfer.

(2b)
Thermal insulator is used for reduction of heat transfer between objects in thermal contact

(2c)
tubes 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)
V∝ Tx μy
LT-∝(MLT-²)x(MLT-¹)y
LT-¹∝ m*L*T-²x x m y L-y
LT-¹∝ m(x+y)L(x-y)T-²x
Comparing
X-y=1
X+y=0
-2x=1
From equation 3
X=½
Putting x = ½ into (eq) 2
y=-½
Equation is
V∝ T½ μ-½
V∝ √T/μ
V= k√T/μ
Where k is constant


(10ai)Critical angle: this is the angle of incidence that
 provides an angle of refraction of 90-degrees.

(10aii)
(i) Light must travel from a denser medium to a rarer medium and 
(ii) the angle of incidence inside the denser medium must be greater than the critical angle.

(10aiii)
-In elescopes application  
-In microscopes applications
-In the binoculars

(10b)

i) Bending of light;If light is moving from rarer to denser medium then it moves towards the normal. 
If it is moving from denser to rarer medium then it moves away from the normal.

ii)Change in wavelength of light

(10ci)

A progressive wave; is a wave that travels continuously in a medium in the same direction without a change in its amplitude

INSTRUCTIONS

ANSWER ONLY FIVE(5) QUESTIONS FROM PART I_

ANSWER ONLY THREE(3) QUESTIONS FROM PART II


TOTAL 8 QUESTIONS

❤️❤️❤️❤️❤️❤️❤️❤️❤️

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Get Waec 2023 physics Obj and Theory questions and answers out.: Waec2023/2024 Physics obj and theory questions and answers| In this article, I will show you past waec 2023/2024 Physics objective and theory/Essay questions and answers for free. 

You will also know the meaning of physics and understand how WAEC Physics questions are set and many other examination guides. Stay focused and read through.

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WAEC 2022/2023 physics Obj & Theory/Essay questions and answers : 

What is physics?


Physics (from historical Greek: φυσική (ἐπιστήμη), romanized: physikḗ (epistḗmē), lit. 'knowledge of nature, from φύσις phýsis 'nature') is the herbal science that studies rely on, its motion and conduct via space and time, and the related entities of electricity and force.

Physics is one of the important purposes to understand how the universe behaves with the most essential scientific disciplines.

Physics inclusion of astronomy, perhaps one of the oldest educational disciplines.  Over plenty of the past millennia, physics, chemistry, biology, and positive branches of mathematics had been a part of herbal philosophy. Still, throughout the clinical Revolution in the seventeenth century, these natural sciences emerged as specific studies endeavors in their personal proper.

Physics along with biophysics and quantum chemistry, and the boundaries of physics aren't rigidly defined. intersects with many interdisciplinary areas of research, physics frequently gives an explanation for the fundamental mechanisms studied via other sciences and suggests new avenues of research in instructional disciplines inclusive of mathematics and philosophy.

Advances in physics regularly enable advances in new technologies. For instance, advances within the know-how of electromagnetism, stable-kingdom physics, and nuclear physics led immediately to the improvement of recent products which have dramatically converted cutting-edge-day society, consisting of tv, computer systems, domestic home equipment, and nuclear guns; advances in thermodynamics caused the improvement of industrialization; advances in mechanics inspired the improvement of calculus.


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Disclaimer: The above questions and answers are not an expo for physics. This past and likely WAEC Physics questions and answers are provided for practice purposes.
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